diff --git a/cmd/gf/go.sum b/cmd/gf/go.sum
index 349b148ec..b7660a7a1 100644
--- a/cmd/gf/go.sum
+++ b/cmd/gf/go.sum
@@ -38,6 +38,20 @@ github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiU
 github.com/go-sql-driver/mysql v1.4.0/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
 github.com/go-sql-driver/mysql v1.7.1 h1:lUIinVbN1DY0xBg0eMOzmmtGoHwWBbvnWubQUrtU8EI=
 github.com/go-sql-driver/mysql v1.7.1/go.mod h1:OXbVy3sEdcQ2Doequ6Z5BW6fXNQTmx+9S1MCJN5yJMI=
+github.com/gogf/gf/contrib/drivers/clickhouse/v2 v2.6.2 h1:A9SPHECm3cu8Px+JmCfU7F9sUM00Azm086V/IGOTjyA=
+github.com/gogf/gf/contrib/drivers/clickhouse/v2 v2.6.2/go.mod h1:uN8UUEk42sgxm7yPucxl94vOjlstJ4TDdmLvP+Ywqxo=
+github.com/gogf/gf/contrib/drivers/mssql/v2 v2.6.2 h1:jSeSz2m/8m9h6ijkOp8q10UNHTc+aoU1xhnFrdFsUxI=
+github.com/gogf/gf/contrib/drivers/mssql/v2 v2.6.2/go.mod h1:5f28iWJU/fqr9OH90sSV5WgsBYz4cIEYsNRKdCL75LI=
+github.com/gogf/gf/contrib/drivers/mysql/v2 v2.6.2 h1:iCUoR8je08TehU633pj+vmNdQ/qmWLTpHYQx7yERTv8=
+github.com/gogf/gf/contrib/drivers/mysql/v2 v2.6.2/go.mod h1:bPYIZ56MyKvLp1P+EWFpkyJ+wofFF9yxChgr/iScP8A=
+github.com/gogf/gf/contrib/drivers/oracle/v2 v2.6.2 h1:f4RcVDNRGH/aCGmnNv/CxZtwNOG1zxNSNoTuFBKPhAc=
+github.com/gogf/gf/contrib/drivers/oracle/v2 v2.6.2/go.mod h1:2okN4j0vs8fNAeYsTDYOhQclN0jkcFvv8LEzoKgwtSw=
+github.com/gogf/gf/contrib/drivers/pgsql/v2 v2.6.2 h1:qXk04hgkn8zPiuwK5EG/0oGf3Fh0MTkw7b5qwaR1+Yo=
+github.com/gogf/gf/contrib/drivers/pgsql/v2 v2.6.2/go.mod h1:T8ON3Jb2wZuC2qitj8QZSMGFbgLNk2ZQIFRSl1OC8qo=
+github.com/gogf/gf/contrib/drivers/sqlite/v2 v2.6.2 h1:IljLQPa+34RRHDO3+dOSzN1rUcEG8+MuJ3Zzq3Bvg08=
+github.com/gogf/gf/contrib/drivers/sqlite/v2 v2.6.2/go.mod h1:S2LEZGkPxA7ZXYDXNxjDPl8LcXdNcM7ODVUqgUz8zpg=
+github.com/gogf/gf/v2 v2.6.2 h1:TvI1UEH2RDbgFVlJJjkc/6ct6+5zjbOS5MiJ2ESG8qg=
+github.com/gogf/gf/v2 v2.6.2/go.mod h1:x2XONYcI4hRQ/4gMNbWHmZrNzSEIg20s2NULbzom5k0=
 github.com/gogf/selfupdate v0.0.0-20231215043001-5c48c528462f h1:7xfXR/BhG3JDqO1s45n65Oyx9t4E/UqDOXep6jXdLCM=
 github.com/gogf/selfupdate v0.0.0-20231215043001-5c48c528462f/go.mod h1:HnYoio6S7VaFJdryKcD/r9HgX+4QzYfr00XiXUo/xz0=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
diff --git a/example/converter/alias_type_convert_with_refer/main.go b/example/converter/alias-type-convert-with-refer/main.go
similarity index 100%
rename from example/converter/alias_type_convert_with_refer/main.go
rename to example/converter/alias-type-convert-with-refer/main.go
diff --git a/example/converter/alias_type_scan/main.go b/example/converter/alias-type-scan/main.go
similarity index 100%
rename from example/converter/alias_type_scan/main.go
rename to example/converter/alias-type-scan/main.go
diff --git a/example/converter/struct_convert_with_refer/main.go b/example/converter/struct-convert-with-refer/main.go
similarity index 100%
rename from example/converter/struct_convert_with_refer/main.go
rename to example/converter/struct-convert-with-refer/main.go
diff --git a/example/converter/struct_scan/main.go b/example/converter/struct-scan/main.go
similarity index 100%
rename from example/converter/struct_scan/main.go
rename to example/converter/struct-scan/main.go
diff --git a/example/httpserver/default_value/main.go b/example/httpserver/default-value/main.go
similarity index 100%
rename from example/httpserver/default_value/main.go
rename to example/httpserver/default-value/main.go
diff --git a/example/httpserver/response_with_json_array/controller.go b/example/httpserver/response-with-json-array/controller.go
similarity index 100%
rename from example/httpserver/response_with_json_array/controller.go
rename to example/httpserver/response-with-json-array/controller.go
diff --git a/example/httpserver/response_with_json_array/main.go b/example/httpserver/response-with-json-array/main.go
similarity index 100%
rename from example/httpserver/response_with_json_array/main.go
rename to example/httpserver/response-with-json-array/main.go
diff --git a/example/httpserver/serve_file/main.go b/example/httpserver/serve-file/main.go
similarity index 100%
rename from example/httpserver/serve_file/main.go
rename to example/httpserver/serve-file/main.go
diff --git a/example/httpserver/swagger_set_template/config.yaml b/example/httpserver/swagger-set-template/config.yaml
similarity index 100%
rename from example/httpserver/swagger_set_template/config.yaml
rename to example/httpserver/swagger-set-template/config.yaml
diff --git a/example/httpserver/swagger_set_template/main.go b/example/httpserver/swagger-set-template/main.go
similarity index 100%
rename from example/httpserver/swagger_set_template/main.go
rename to example/httpserver/swagger-set-template/main.go
diff --git a/example/httpserver/upload_file/main.go b/example/httpserver/upload-file/main.go
similarity index 100%
rename from example/httpserver/upload_file/main.go
rename to example/httpserver/upload-file/main.go
diff --git a/example/os/cron/linux-crontab/main.go b/example/os/cron/linux-crontab/main.go
new file mode 100644
index 000000000..89260c194
--- /dev/null
+++ b/example/os/cron/linux-crontab/main.go
@@ -0,0 +1,39 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/gogf/gf/v2/os/gcron"
+	"github.com/gogf/gf/v2/os/gctx"
+	"github.com/gogf/gf/v2/os/gtime"
+)
+
+func main() {
+	fmt.Println("start:", gtime.Now())
+	var (
+		err      error
+		pattern1 = "# * * * * *"
+		pattern2 = "# */2 * * * *"
+	)
+	_, err = gcron.Add(gctx.New(), pattern1, func(ctx context.Context) {
+		fmt.Println(pattern1, gtime.Now())
+	})
+	if err != nil {
+		panic(err)
+	}
+	_, err = gcron.Add(gctx.New(), pattern2, func(ctx context.Context) {
+		fmt.Println(pattern2, gtime.Now())
+	})
+	if err != nil {
+		panic(err)
+	}
+
+	select {}
+}
diff --git a/example/os/log/ctx_keys/config.yaml b/example/os/log/ctx-keys/config.yaml
similarity index 100%
rename from example/os/log/ctx_keys/config.yaml
rename to example/os/log/ctx-keys/config.yaml
diff --git a/example/os/log/ctx_keys/main.go b/example/os/log/ctx-keys/main.go
similarity index 100%
rename from example/os/log/ctx_keys/main.go
rename to example/os/log/ctx-keys/main.go
diff --git a/example/trace/grpc_with_db/client/client.go b/example/trace/grpc-with-db/client/client.go
similarity index 96%
rename from example/trace/grpc_with_db/client/client.go
rename to example/trace/grpc-with-db/client/client.go
index aa7a6dd2b..ea0b754f5 100644
--- a/example/trace/grpc_with_db/client/client.go
+++ b/example/trace/grpc-with-db/client/client.go
@@ -10,7 +10,7 @@ import (
 	"github.com/gogf/gf/contrib/registry/etcd/v2"
 	"github.com/gogf/gf/contrib/rpc/grpcx/v2"
 	"github.com/gogf/gf/contrib/trace/otlpgrpc/v2"
-	"github.com/gogf/gf/example/trace/grpc_with_db/protobuf/user"
+	"github.com/gogf/gf/example/trace/grpc-with-db/protobuf/user"
 	"github.com/gogf/gf/v2/frame/g"
 	"github.com/gogf/gf/v2/net/gtrace"
 	"github.com/gogf/gf/v2/os/gctx"
diff --git a/example/trace/grpc_with_db/protobuf/user/user.pb.go b/example/trace/grpc-with-db/protobuf/user/user.pb.go
similarity index 100%
rename from example/trace/grpc_with_db/protobuf/user/user.pb.go
rename to example/trace/grpc-with-db/protobuf/user/user.pb.go
diff --git a/example/trace/grpc_with_db/protobuf/user/user.proto b/example/trace/grpc-with-db/protobuf/user/user.proto
similarity index 100%
rename from example/trace/grpc_with_db/protobuf/user/user.proto
rename to example/trace/grpc-with-db/protobuf/user/user.proto
diff --git a/example/trace/grpc_with_db/protobuf/user/user_grpc.pb.go b/example/trace/grpc-with-db/protobuf/user/user_grpc.pb.go
similarity index 100%
rename from example/trace/grpc_with_db/protobuf/user/user_grpc.pb.go
rename to example/trace/grpc-with-db/protobuf/user/user_grpc.pb.go
diff --git a/example/trace/grpc_with_db/server/config.yaml b/example/trace/grpc-with-db/server/config.yaml
similarity index 100%
rename from example/trace/grpc_with_db/server/config.yaml
rename to example/trace/grpc-with-db/server/config.yaml
diff --git a/example/trace/grpc_with_db/server/server.go b/example/trace/grpc-with-db/server/server.go
similarity index 97%
rename from example/trace/grpc_with_db/server/server.go
rename to example/trace/grpc-with-db/server/server.go
index a3e6615a5..286890d55 100644
--- a/example/trace/grpc_with_db/server/server.go
+++ b/example/trace/grpc-with-db/server/server.go
@@ -11,7 +11,7 @@ import (
 	_ "github.com/gogf/gf/contrib/nosql/redis/v2"
 	"github.com/gogf/gf/contrib/registry/etcd/v2"
 	"github.com/gogf/gf/contrib/trace/otlpgrpc/v2"
-	"github.com/gogf/gf/example/trace/grpc_with_db/protobuf/user"
+	"github.com/gogf/gf/example/trace/grpc-with-db/protobuf/user"
 
 	"context"
 	"fmt"
diff --git a/example/trace/grpc_with_db/sql.sql b/example/trace/grpc-with-db/sql.sql
similarity index 100%
rename from example/trace/grpc_with_db/sql.sql
rename to example/trace/grpc-with-db/sql.sql
diff --git a/example/trace/http_with_db/client/client.go b/example/trace/http-with-db/client/client.go
similarity index 100%
rename from example/trace/http_with_db/client/client.go
rename to example/trace/http-with-db/client/client.go
diff --git a/example/trace/http_with_db/server/config.yaml b/example/trace/http-with-db/server/config.yaml
similarity index 100%
rename from example/trace/http_with_db/server/config.yaml
rename to example/trace/http-with-db/server/config.yaml
diff --git a/example/trace/http_with_db/server/server.go b/example/trace/http-with-db/server/server.go
similarity index 100%
rename from example/trace/http_with_db/server/server.go
rename to example/trace/http-with-db/server/server.go
diff --git a/example/trace/http_with_db/sql.sql b/example/trace/http-with-db/sql.sql
similarity index 100%
rename from example/trace/http_with_db/sql.sql
rename to example/trace/http-with-db/sql.sql
diff --git a/os/gcron/gcron.go b/os/gcron/gcron.go
index 05e834d3b..9cccc9f42 100644
--- a/os/gcron/gcron.go
+++ b/os/gcron/gcron.go
@@ -27,12 +27,12 @@ var (
 	defaultCron = New()
 )
 
-// SetLogger sets the logger for cron.
+// SetLogger sets the global logger for cron.
 func SetLogger(logger glog.ILogger) {
 	defaultCron.SetLogger(logger)
 }
 
-// GetLogger returns the logger in the cron.
+// GetLogger returns the global logger in the cron.
 func GetLogger() glog.ILogger {
 	return defaultCron.GetLogger()
 }
diff --git a/os/gcron/gcron_cron.go b/os/gcron/gcron_cron.go
index 1a83f57bc..1ff368b33 100644
--- a/os/gcron/gcron_cron.go
+++ b/os/gcron/gcron_cron.go
@@ -17,6 +17,7 @@ import (
 	"github.com/gogf/gf/v2/os/gtimer"
 )
 
+// Cron stores all the cron job entries.
 type Cron struct {
 	idGen   *gtype.Int64    // Used for unique name generation.
 	status  *gtype.Int      // Timed task status(0: Not Start; 1: Running; 2: Stopped; -1: Closed)
@@ -44,7 +45,9 @@ func (c *Cron) GetLogger() glog.ILogger {
 }
 
 // AddEntry creates and returns a new Entry object.
-func (c *Cron) AddEntry(ctx context.Context, pattern string, job JobFunc, times int, isSingleton bool, name ...string) (*Entry, error) {
+func (c *Cron) AddEntry(
+	ctx context.Context, pattern string, job JobFunc, times int, isSingleton bool, name ...string,
+) (*Entry, error) {
 	var (
 		entryName = ""
 		infinite  = false
diff --git a/os/gcron/gcron_entry.go b/os/gcron/gcron_entry.go
index 878f2fa84..ae61bbb1d 100644
--- a/os/gcron/gcron_entry.go
+++ b/os/gcron/gcron_entry.go
@@ -51,7 +51,11 @@ type doAddEntryInput struct {
 func (c *Cron) doAddEntry(in doAddEntryInput) (*Entry, error) {
 	if in.Name != "" {
 		if c.Search(in.Name) != nil {
-			return nil, gerror.NewCodef(gcode.CodeInvalidOperation, `cron job "%s" already exists`, in.Name)
+			return nil, gerror.NewCodef(
+				gcode.CodeInvalidOperation,
+				`duplicated cron job name "%s", already exists`,
+				in.Name,
+			)
 		}
 	}
 	schedule, err := newSchedule(in.Pattern)
@@ -91,103 +95,104 @@ func (c *Cron) doAddEntry(in doAddEntryInput) (*Entry, error) {
 }
 
 // IsSingleton return whether this entry is a singleton timed task.
-func (entry *Entry) IsSingleton() bool {
-	return entry.timerEntry.IsSingleton()
+func (e *Entry) IsSingleton() bool {
+	return e.timerEntry.IsSingleton()
 }
 
 // SetSingleton sets the entry running in singleton mode.
-func (entry *Entry) SetSingleton(enabled bool) {
-	entry.timerEntry.SetSingleton(enabled)
+func (e *Entry) SetSingleton(enabled bool) {
+	e.timerEntry.SetSingleton(enabled)
 }
 
 // SetTimes sets the times which the entry can run.
-func (entry *Entry) SetTimes(times int) {
-	entry.times.Set(times)
-	entry.infinite.Set(false)
+func (e *Entry) SetTimes(times int) {
+	e.times.Set(times)
+	e.infinite.Set(false)
 }
 
 // Status returns the status of entry.
-func (entry *Entry) Status() int {
-	return entry.timerEntry.Status()
+func (e *Entry) Status() int {
+	return e.timerEntry.Status()
 }
 
 // SetStatus sets the status of the entry.
-func (entry *Entry) SetStatus(status int) int {
-	return entry.timerEntry.SetStatus(status)
+func (e *Entry) SetStatus(status int) int {
+	return e.timerEntry.SetStatus(status)
 }
 
 // Start starts running the entry.
-func (entry *Entry) Start() {
-	entry.timerEntry.Start()
+func (e *Entry) Start() {
+	e.timerEntry.Start()
 }
 
 // Stop stops running the entry.
-func (entry *Entry) Stop() {
-	entry.timerEntry.Stop()
+func (e *Entry) Stop() {
+	e.timerEntry.Stop()
 }
 
 // Close stops and removes the entry from cron.
-func (entry *Entry) Close() {
-	entry.cron.entries.Remove(entry.Name)
-	entry.timerEntry.Close()
+func (e *Entry) Close() {
+	e.cron.entries.Remove(e.Name)
+	e.timerEntry.Close()
 }
 
 // checkAndRun is the core timing task check logic.
-func (entry *Entry) checkAndRun(ctx context.Context) {
+// This function is called every second.
+func (e *Entry) checkAndRun(ctx context.Context) {
 	currentTime := time.Now()
-	if !entry.schedule.checkMeetAndUpdateLastSeconds(ctx, currentTime) {
+	if !e.schedule.checkMeetAndUpdateLastSeconds(ctx, currentTime) {
 		return
 	}
-	switch entry.cron.status.Val() {
+	switch e.cron.status.Val() {
 	case StatusStopped:
 		return
 
 	case StatusClosed:
-		entry.logDebugf(ctx, `cron job "%s" is removed`, entry.getJobNameWithPattern())
-		entry.Close()
+		e.logDebugf(ctx, `cron job "%s" is removed`, e.getJobNameWithPattern())
+		e.Close()
 
 	case StatusReady, StatusRunning:
 		defer func() {
 			if exception := recover(); exception != nil {
 				// Exception caught, it logs the error content to logger in default behavior.
-				entry.logErrorf(ctx,
+				e.logErrorf(ctx,
 					`cron job "%s(%s)" end with error: %+v`,
-					entry.jobName, entry.schedule.pattern, exception,
+					e.jobName, e.schedule.pattern, exception,
 				)
 			} else {
-				entry.logDebugf(ctx, `cron job "%s" ends`, entry.getJobNameWithPattern())
+				e.logDebugf(ctx, `cron job "%s" ends`, e.getJobNameWithPattern())
 			}
-			if entry.timerEntry.Status() == StatusClosed {
-				entry.Close()
+			if e.timerEntry.Status() == StatusClosed {
+				e.Close()
 			}
 		}()
 
 		// Running times check.
-		if !entry.infinite.Val() {
-			times := entry.times.Add(-1)
+		if !e.infinite.Val() {
+			times := e.times.Add(-1)
 			if times <= 0 {
-				if entry.timerEntry.SetStatus(StatusClosed) == StatusClosed || times < 0 {
+				if e.timerEntry.SetStatus(StatusClosed) == StatusClosed || times < 0 {
 					return
 				}
 			}
 		}
-		entry.logDebugf(ctx, `cron job "%s" starts`, entry.getJobNameWithPattern())
-		entry.Job(ctx)
+		e.logDebugf(ctx, `cron job "%s" starts`, e.getJobNameWithPattern())
+		e.Job(ctx)
 	}
 }
 
-func (entry *Entry) getJobNameWithPattern() string {
-	return fmt.Sprintf(`%s(%s)`, entry.jobName, entry.schedule.pattern)
+func (e *Entry) getJobNameWithPattern() string {
+	return fmt.Sprintf(`%s(%s)`, e.jobName, e.schedule.pattern)
 }
 
-func (entry *Entry) logDebugf(ctx context.Context, format string, v ...interface{}) {
-	if logger := entry.cron.GetLogger(); logger != nil {
+func (e *Entry) logDebugf(ctx context.Context, format string, v ...interface{}) {
+	if logger := e.cron.GetLogger(); logger != nil {
 		logger.Debugf(ctx, format, v...)
 	}
 }
 
-func (entry *Entry) logErrorf(ctx context.Context, format string, v ...interface{}) {
-	logger := entry.cron.GetLogger()
+func (e *Entry) logErrorf(ctx context.Context, format string, v ...interface{}) {
+	logger := e.cron.GetLogger()
 	if logger == nil {
 		logger = glog.DefaultLogger()
 	}
diff --git a/os/gcron/gcron_schedule.go b/os/gcron/gcron_schedule.go
index abeb345ec..abf685f5f 100644
--- a/os/gcron/gcron_schedule.go
+++ b/os/gcron/gcron_schedule.go
@@ -7,7 +7,6 @@
 package gcron
 
 import (
-	"context"
 	"strconv"
 	"strings"
 	"time"
@@ -23,34 +22,48 @@ import (
 type cronSchedule struct {
 	createTimestamp int64            // Created timestamp in seconds.
 	everySeconds    int64            // Running interval in seconds.
-	pattern         string           // The raw cron pattern string.
+	pattern         string           // The raw cron pattern string that is passed in cron job creation.
+	ignoreSeconds   bool             // Mark the pattern is standard 5 parts crontab pattern instead 6 parts pattern.
 	secondMap       map[int]struct{} // Job can run in these second numbers.
 	minuteMap       map[int]struct{} // Job can run in these minute numbers.
 	hourMap         map[int]struct{} // Job can run in these hour numbers.
 	dayMap          map[int]struct{} // Job can run in these day numbers.
 	weekMap         map[int]struct{} // Job can run in these week numbers.
 	monthMap        map[int]struct{} // Job can run in these moth numbers.
-	lastTimestamp   *gtype.Int64     // Last timestamp number, for timestamp fix in some delay.
+
+	// This field stores the timestamp that meets schedule latest.
+	lastMeetTimestamp *gtype.Int64
+
+	// Last timestamp number, for timestamp fix in some latency.
+	lastCheckTimestamp *gtype.Int64
 }
 
+type patternItemType int
+
+const (
+	patternItemTypeSecond patternItemType = iota
+	patternItemTypeMinute
+	patternItemTypeHour
+	patternItemTypeDay
+	patternItemTypeWeek
+	patternItemTypeMonth
+)
+
 const (
 	// regular expression for cron pattern, which contains 6 parts of time units.
-	regexForCron           = `^([\-/\d\*\?,]+)\s+([\-/\d\*\?,]+)\s+([\-/\d\*\?,]+)\s+([\-/\d\*\?,]+)\s+([\-/\d\*\?,A-Za-z]+)\s+([\-/\d\*\?,A-Za-z]+)$`
-	patternItemTypeUnknown = iota
-	patternItemTypeWeek
-	patternItemTypeMonth
+	regexForCron = `^([\-/\d\*,#]+)\s+([\-/\d\*,]+)\s+([\-/\d\*,]+)\s+([\-/\d\*\?,]+)\s+([\-/\d\*,A-Za-z]+)\s+([\-/\d\*\?,A-Za-z]+)$`
 )
 
 var (
 	// Predefined pattern map.
 	predefinedPatternMap = map[string]string{
-		"@yearly":   "0 0 0 1 1 *",
-		"@annually": "0 0 0 1 1 *",
-		"@monthly":  "0 0 0 1 * *",
-		"@weekly":   "0 0 0 * * 0",
-		"@daily":    "0 0 0 * * *",
-		"@midnight": "0 0 0 * * *",
-		"@hourly":   "0 0 * * * *",
+		"@yearly":   "# 0 0 1 1 *",
+		"@annually": "# 0 0 1 1 *",
+		"@monthly":  "# 0 0 1 * *",
+		"@weekly":   "# 0 0 * * 0",
+		"@daily":    "# 0 0 * * *",
+		"@midnight": "# 0 0 * * *",
+		"@hourly":   "# 0 * * * *",
 	}
 	// Short month name to its number.
 	monthShortNameMap = map[string]int{
@@ -107,7 +120,7 @@ var (
 // newSchedule creates and returns a schedule object for given cron pattern.
 func newSchedule(pattern string) (*cronSchedule, error) {
 	var currentTimestamp = time.Now().Unix()
-	// Check if the predefined patterns.
+	// Check given `pattern` if the predefined patterns.
 	if match, _ := gregex.MatchString(`(@\w+)\s*(\w*)\s*`, pattern); len(match) > 0 {
 		key := strings.ToLower(match[1])
 		if v, ok := predefinedPatternMap[key]; ok {
@@ -118,83 +131,93 @@ func newSchedule(pattern string) (*cronSchedule, error) {
 				return nil, err
 			}
 			return &cronSchedule{
-				createTimestamp: currentTimestamp,
-				everySeconds:    int64(d.Seconds()),
-				pattern:         pattern,
-				lastTimestamp:   gtype.NewInt64(currentTimestamp),
+				createTimestamp:    currentTimestamp,
+				everySeconds:       int64(d.Seconds()),
+				pattern:            pattern,
+				lastMeetTimestamp:  gtype.NewInt64(currentTimestamp),
+				lastCheckTimestamp: gtype.NewInt64(currentTimestamp),
 			}, nil
 		} else {
 			return nil, gerror.NewCodef(gcode.CodeInvalidParameter, `invalid pattern: "%s"`, pattern)
 		}
 	}
-	// Handle the common cron pattern, like:
-	// 0 0 0 1 1 2
-	if match, _ := gregex.MatchString(regexForCron, pattern); len(match) == 7 {
-		schedule := &cronSchedule{
-			createTimestamp: currentTimestamp,
-			everySeconds:    0,
-			pattern:         pattern,
-			lastTimestamp:   gtype.NewInt64(currentTimestamp),
-		}
-		// Second.
-		if m, err := parsePatternItem(match[1], 0, 59, false); err != nil {
-			return nil, err
-		} else {
-			schedule.secondMap = m
-		}
-		// Minute.
-		if m, err := parsePatternItem(match[2], 0, 59, false); err != nil {
-			return nil, err
-		} else {
-			schedule.minuteMap = m
-		}
-		// Hour.
-		if m, err := parsePatternItem(match[3], 0, 23, false); err != nil {
-			return nil, err
-		} else {
-			schedule.hourMap = m
-		}
-		// Day.
-		if m, err := parsePatternItem(match[4], 1, 31, true); err != nil {
-			return nil, err
-		} else {
-			schedule.dayMap = m
-		}
-		// Month.
-		if m, err := parsePatternItem(match[5], 1, 12, false); err != nil {
-			return nil, err
-		} else {
-			schedule.monthMap = m
-		}
-		// Week.
-		if m, err := parsePatternItem(match[6], 0, 6, true); err != nil {
-			return nil, err
-		} else {
-			schedule.weekMap = m
-		}
-		return schedule, nil
+	// Handle given `pattern` as common 6 parts pattern.
+	match, _ := gregex.MatchString(regexForCron, pattern)
+	if len(match) != 7 {
+		return nil, gerror.NewCodef(gcode.CodeInvalidParameter, `invalid pattern: "%s"`, pattern)
 	}
-	return nil, gerror.NewCodef(gcode.CodeInvalidParameter, `invalid pattern: "%s"`, pattern)
+	var (
+		err error
+		cs  = &cronSchedule{
+			createTimestamp:    currentTimestamp,
+			everySeconds:       0,
+			pattern:            pattern,
+			lastMeetTimestamp:  gtype.NewInt64(currentTimestamp),
+			lastCheckTimestamp: gtype.NewInt64(currentTimestamp),
+		}
+	)
+
+	// Second.
+	if match[1] == "#" {
+		cs.ignoreSeconds = true
+	} else {
+		cs.secondMap, err = parsePatternItem(match[1], 0, 59, false, patternItemTypeSecond)
+		if err != nil {
+			return nil, err
+		}
+	}
+	// Minute.
+	cs.minuteMap, err = parsePatternItem(match[2], 0, 59, false, patternItemTypeMinute)
+	if err != nil {
+		return nil, err
+	}
+	// Hour.
+	cs.hourMap, err = parsePatternItem(match[3], 0, 23, false, patternItemTypeHour)
+	if err != nil {
+		return nil, err
+	}
+	// Day.
+	cs.dayMap, err = parsePatternItem(match[4], 1, 31, true, patternItemTypeDay)
+	if err != nil {
+		return nil, err
+	}
+	// Month.
+	cs.monthMap, err = parsePatternItem(match[5], 1, 12, false, patternItemTypeMonth)
+	if err != nil {
+		return nil, err
+	}
+	// Week.
+	cs.weekMap, err = parsePatternItem(match[6], 0, 6, true, patternItemTypeWeek)
+	if err != nil {
+		return nil, err
+	}
+	return cs, nil
 }
 
 // parsePatternItem parses every item in the pattern and returns the result as map, which is used for indexing.
-func parsePatternItem(item string, min int, max int, allowQuestionMark bool) (map[int]struct{}, error) {
-	m := make(map[int]struct{}, max-min+1)
+func parsePatternItem(
+	item string, min int, max int,
+	allowQuestionMark bool, itemType patternItemType,
+) (itemMap map[int]struct{}, err error) {
+	itemMap = make(map[int]struct{}, max-min+1)
 	if item == "*" || (allowQuestionMark && item == "?") {
 		for i := min; i <= max; i++ {
-			m[i] = struct{}{}
+			itemMap[i] = struct{}{}
 		}
-		return m, nil
+		return itemMap, nil
 	}
-	// Like: MON,FRI
+	// Example: 1-10/2,11-30/3
+	var number int
 	for _, itemElem := range strings.Split(item, ",") {
 		var (
 			interval      = 1
 			intervalArray = strings.Split(itemElem, "/")
 		)
 		if len(intervalArray) == 2 {
-			if number, err := strconv.Atoi(intervalArray[1]); err != nil {
-				return nil, gerror.NewCodef(gcode.CodeInvalidParameter, `invalid pattern item: "%s"`, itemElem)
+			if number, err = strconv.Atoi(intervalArray[1]); err != nil {
+				return nil, gerror.NewCodef(
+					gcode.CodeInvalidParameter, `invalid pattern item: "%s"`, itemElem,
+				)
 			} else {
 				interval = number
 			}
@@ -202,22 +225,14 @@ func parsePatternItem(item string, min int, max int, allowQuestionMark bool) (ma
 		var (
 			rangeMin   = min
 			rangeMax   = max
-			itemType   = patternItemTypeUnknown
-			rangeArray = strings.Split(intervalArray[0], "-") // Like: 1-30, JAN-DEC
+			rangeArray = strings.Split(intervalArray[0], "-") // Example: 1-30, JAN-DEC
 		)
-		switch max {
-		case 6:
-			// It's checking week field.
-			itemType = patternItemTypeWeek
-
-		case 12:
-			// It's checking month field.
-			itemType = patternItemTypeMonth
-		}
-		// Eg: */5
+		// Example: 1-30/2
 		if rangeArray[0] != "*" {
-			if number, err := parsePatternItemValue(rangeArray[0], itemType); err != nil {
-				return nil, gerror.NewCodef(gcode.CodeInvalidParameter, `invalid pattern item: "%s"`, itemElem)
+			if number, err = parseWeekAndMonthNameToInt(rangeArray[0], itemType); err != nil {
+				return nil, gerror.NewCodef(
+					gcode.CodeInvalidParameter, `invalid pattern item: "%s"`, itemElem,
+				)
 			} else {
 				rangeMin = number
 				if len(intervalArray) == 1 {
@@ -225,22 +240,25 @@ func parsePatternItem(item string, min int, max int, allowQuestionMark bool) (ma
 				}
 			}
 		}
+		// Example: 1-30/2
 		if len(rangeArray) == 2 {
-			if number, err := parsePatternItemValue(rangeArray[1], itemType); err != nil {
-				return nil, gerror.NewCodef(gcode.CodeInvalidParameter, `invalid pattern item: "%s"`, itemElem)
+			if number, err = parseWeekAndMonthNameToInt(rangeArray[1], itemType); err != nil {
+				return nil, gerror.NewCodef(
+					gcode.CodeInvalidParameter, `invalid pattern item: "%s"`, itemElem,
+				)
 			} else {
 				rangeMax = number
 			}
 		}
 		for i := rangeMin; i <= rangeMax; i += interval {
-			m[i] = struct{}{}
+			itemMap[i] = struct{}{}
 		}
 	}
-	return m, nil
+	return
 }
 
-// parsePatternItemValue parses the field value to a number according to its field type.
-func parsePatternItemValue(value string, itemType int) (int, error) {
+// parseWeekAndMonthNameToInt parses the field value to a number according to its field type.
+func parseWeekAndMonthNameToInt(value string, itemType patternItemType) (int, error) {
 	if gregex.IsMatchString(`^\d+$`, value) {
 		// It is pure number.
 		if number, err := strconv.Atoi(value); err == nil {
@@ -268,145 +286,3 @@ func parsePatternItemValue(value string, itemType int) (int, error) {
 	}
 	return 0, gerror.NewCodef(gcode.CodeInvalidParameter, `invalid pattern value: "%s"`, value)
 }
-
-// checkMeetAndUpdateLastSeconds checks if the given time `t` meets the runnable point for the job.
-func (s *cronSchedule) checkMeetAndUpdateLastSeconds(ctx context.Context, t time.Time) bool {
-	var (
-		lastTimestamp = s.getAndUpdateLastTimestamp(ctx, t)
-		lastTime      = gtime.NewFromTimeStamp(lastTimestamp)
-	)
-
-	if s.everySeconds != 0 {
-		// It checks using interval.
-		secondsAfterCreated := lastTime.Timestamp() - s.createTimestamp
-		if secondsAfterCreated > 0 {
-			return secondsAfterCreated%s.everySeconds == 0
-		}
-		return false
-	}
-
-	// It checks using normal cron pattern.
-	if _, ok := s.secondMap[lastTime.Second()]; !ok {
-		return false
-	}
-	if _, ok := s.minuteMap[lastTime.Minute()]; !ok {
-		return false
-	}
-	if _, ok := s.hourMap[lastTime.Hour()]; !ok {
-		return false
-	}
-	if _, ok := s.dayMap[lastTime.Day()]; !ok {
-		return false
-	}
-	if _, ok := s.monthMap[lastTime.Month()]; !ok {
-		return false
-	}
-	if _, ok := s.weekMap[int(lastTime.Weekday())]; !ok {
-		return false
-	}
-	return true
-}
-
-// Next returns the next time this schedule is activated, greater than the given
-// time.  If no time can be found to satisfy the schedule, return the zero time.
-func (s *cronSchedule) Next(t time.Time) time.Time {
-	if s.everySeconds != 0 {
-		var (
-			diff  = t.Unix() - s.createTimestamp
-			count = diff/s.everySeconds + 1
-		)
-		return t.Add(time.Duration(count*s.everySeconds) * time.Second)
-	}
-
-	// Start at the earliest possible time (the upcoming second).
-	t = t.Add(1*time.Second - time.Duration(t.Nanosecond())*time.Nanosecond)
-	var (
-		loc       = t.Location()
-		added     = false
-		yearLimit = t.Year() + 5
-	)
-
-WRAP:
-	if t.Year() > yearLimit {
-		return t // who will care the job that run in five years later
-	}
-
-	for !s.match(s.monthMap, int(t.Month())) {
-		if !added {
-			added = true
-			t = time.Date(t.Year(), t.Month(), 1, 0, 0, 0, 0, loc)
-		}
-		t = t.AddDate(0, 1, 0)
-		// need recheck
-		if t.Month() == time.January {
-			goto WRAP
-		}
-	}
-
-	for !s.dayMatches(t) {
-		if !added {
-			added = true
-			t = time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, loc)
-		}
-		t = t.AddDate(0, 0, 1)
-
-		// Notice if the hour is no longer midnight due to DST.
-		// Add an hour if it's 23, subtract an hour if it's 1.
-		if t.Hour() != 0 {
-			if t.Hour() > 12 {
-				t = t.Add(time.Duration(24-t.Hour()) * time.Hour)
-			} else {
-				t = t.Add(time.Duration(-t.Hour()) * time.Hour)
-			}
-		}
-		if t.Day() == 1 {
-			goto WRAP
-		}
-	}
-	for !s.match(s.hourMap, t.Hour()) {
-		if !added {
-			added = true
-			t = time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), 0, 0, 0, loc)
-		}
-		t = t.Add(time.Hour)
-		// need recheck
-		if t.Hour() == 0 {
-			goto WRAP
-		}
-	}
-	for !s.match(s.minuteMap, t.Minute()) {
-		if !added {
-			added = true
-			t = t.Truncate(time.Minute)
-		}
-		t = t.Add(1 * time.Minute)
-
-		if t.Minute() == 0 {
-			goto WRAP
-		}
-	}
-	for !s.match(s.secondMap, t.Second()) {
-		if !added {
-			added = true
-			t = t.Truncate(time.Second)
-		}
-		t = t.Add(1 * time.Second)
-		if t.Second() == 0 {
-			goto WRAP
-		}
-	}
-	return t.In(loc)
-}
-
-// dayMatches returns true if the schedule's day-of-week and day-of-month
-// restrictions are satisfied by the given time.
-func (s *cronSchedule) dayMatches(t time.Time) bool {
-	_, ok1 := s.dayMap[t.Day()]
-	_, ok2 := s.weekMap[int(t.Weekday())]
-	return ok1 && ok2
-}
-
-func (s *cronSchedule) match(m map[int]struct{}, key int) bool {
-	_, ok := m[key]
-	return ok
-}
diff --git a/os/gcron/gcron_schedule_check.go b/os/gcron/gcron_schedule_check.go
new file mode 100644
index 000000000..b6625e7ed
--- /dev/null
+++ b/os/gcron/gcron_schedule_check.go
@@ -0,0 +1,152 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gcron
+
+import (
+	"context"
+	"time"
+
+	"github.com/gogf/gf/v2/os/gtime"
+)
+
+// checkMeetAndUpdateLastSeconds checks if the given time `t` meets the runnable point for the job.
+// This function is called every second.
+func (s *cronSchedule) checkMeetAndUpdateLastSeconds(ctx context.Context, currentTime time.Time) (ok bool) {
+	var (
+		lastCheckTimestamp = s.getAndUpdateLastCheckTimestamp(ctx, currentTime)
+		lastCheckTime      = gtime.NewFromTimeStamp(lastCheckTimestamp)
+		lastMeetTime       = gtime.NewFromTimeStamp(s.lastMeetTimestamp.Val())
+	)
+	defer func() {
+		if ok {
+			s.lastMeetTimestamp.Set(currentTime.Unix())
+		}
+	}()
+	if !s.checkMinIntervalAndItemMapMeet(lastMeetTime.Time, lastCheckTime.Time, currentTime) {
+		return false
+	}
+	return true
+}
+
+func (s *cronSchedule) checkMinIntervalAndItemMapMeet(
+	lastMeetTime, lastCheckTime, currentTime time.Time,
+) (ok bool) {
+	if s.everySeconds != 0 {
+		// It checks using interval.
+		secondsAfterCreated := lastCheckTime.UnixNano()/1e9 - s.createTimestamp
+		if secondsAfterCreated > 0 {
+			return secondsAfterCreated%s.everySeconds == 0
+		}
+		return false
+	}
+	if !s.checkMeetSecond(lastMeetTime, currentTime) {
+		return false
+	}
+	if !s.checkMeetMinute(currentTime) {
+		return false
+	}
+	if !s.checkMeetHour(currentTime) {
+		return false
+	}
+	if !s.checkMeetDay(currentTime) {
+		return false
+	}
+	if !s.checkMeetMonth(currentTime) {
+		return false
+	}
+	if !s.checkMeetWeek(currentTime) {
+		return false
+	}
+	return true
+}
+
+func (s *cronSchedule) checkMeetSecond(lastMeetTime, currentTime time.Time) (ok bool) {
+	if s.ignoreSeconds {
+		if currentTime.Unix()-lastMeetTime.Unix() < 60 {
+			return false
+		}
+	} else {
+		if !s.keyMatch(s.secondMap, currentTime.Second()) {
+			return false
+		}
+	}
+	return true
+}
+
+func (s *cronSchedule) checkMeetMinute(currentTime time.Time) (ok bool) {
+	if !s.keyMatch(s.minuteMap, currentTime.Minute()) {
+		return false
+	}
+	return true
+}
+
+func (s *cronSchedule) checkMeetHour(currentTime time.Time) (ok bool) {
+	if !s.keyMatch(s.hourMap, currentTime.Hour()) {
+		return false
+	}
+	return true
+}
+
+func (s *cronSchedule) checkMeetDay(currentTime time.Time) (ok bool) {
+	if !s.keyMatch(s.dayMap, currentTime.Day()) {
+		return false
+	}
+	return true
+}
+
+func (s *cronSchedule) checkMeetMonth(currentTime time.Time) (ok bool) {
+	if !s.keyMatch(s.monthMap, int(currentTime.Month())) {
+		return false
+	}
+	return true
+}
+
+func (s *cronSchedule) checkMeetWeek(currentTime time.Time) (ok bool) {
+	if !s.keyMatch(s.weekMap, int(currentTime.Weekday())) {
+		return false
+	}
+	return true
+}
+
+func (s *cronSchedule) keyMatch(m map[int]struct{}, key int) bool {
+	_, ok := m[key]
+	return ok
+}
+
+func (s *cronSchedule) checkItemMapMeet(lastMeetTime, currentTime time.Time) (ok bool) {
+	// second.
+	if s.ignoreSeconds {
+		if currentTime.Unix()-lastMeetTime.Unix() < 60 {
+			return false
+		}
+	} else {
+		if !s.keyMatch(s.secondMap, currentTime.Second()) {
+			return false
+		}
+	}
+	// minute.
+	if !s.keyMatch(s.minuteMap, currentTime.Minute()) {
+		return false
+	}
+	// hour.
+	if !s.keyMatch(s.hourMap, currentTime.Hour()) {
+		return false
+	}
+	// day.
+	if !s.keyMatch(s.dayMap, currentTime.Day()) {
+		return false
+	}
+	// month.
+	if !s.keyMatch(s.monthMap, int(currentTime.Month())) {
+		return false
+	}
+	// week.
+	if !s.keyMatch(s.weekMap, int(currentTime.Weekday())) {
+		return false
+	}
+	return true
+}
diff --git a/os/gcron/gcron_schedule_fix.go b/os/gcron/gcron_schedule_fix.go
index fac3da1c4..13439597e 100644
--- a/os/gcron/gcron_schedule_fix.go
+++ b/os/gcron/gcron_schedule_fix.go
@@ -13,35 +13,48 @@ import (
 	"github.com/gogf/gf/v2/internal/intlog"
 )
 
-// getAndUpdateLastTimestamp checks fixes and returns the last timestamp that have delay fix in some seconds.
-func (s *cronSchedule) getAndUpdateLastTimestamp(ctx context.Context, t time.Time) int64 {
+// getAndUpdateLastCheckTimestamp checks fixes and returns the last timestamp that have delay fix in some seconds.
+func (s *cronSchedule) getAndUpdateLastCheckTimestamp(ctx context.Context, t time.Time) int64 {
 	var (
-		currentTimestamp = t.Unix()
-		lastTimestamp    = s.lastTimestamp.Val()
+		currentTimestamp   = t.Unix()
+		lastCheckTimestamp = s.lastCheckTimestamp.Val()
 	)
 	switch {
+	// Often happens, timer triggers in the same second.
+	// Example:
+	// lastCheckTimestamp:    10
+	// currentTimestamp: 10
 	case
-		lastTimestamp == currentTimestamp:
-		lastTimestamp += 1
+		lastCheckTimestamp == currentTimestamp:
+		lastCheckTimestamp += 1
 
+	// Often happens, no latency.
+	// Example:
+	// lastCheckTimestamp:    9
+	// currentTimestamp: 10
 	case
-		lastTimestamp == currentTimestamp-1:
-		lastTimestamp = currentTimestamp
+		lastCheckTimestamp == currentTimestamp-1:
+		lastCheckTimestamp = currentTimestamp
 
+	// Latency in 3 seconds, which can be tolerant.
+	// Example:
+	// lastCheckTimestamp:    7/8
+	// currentTimestamp: 10
 	case
-		lastTimestamp == currentTimestamp-2,
-		lastTimestamp == currentTimestamp-3:
-		lastTimestamp += 1
+		lastCheckTimestamp == currentTimestamp-2,
+		lastCheckTimestamp == currentTimestamp-3:
+		lastCheckTimestamp += 1
 
+	// Too much latency, it ignores the fix, the cron job might not be triggered.
 	default:
 		// Too much delay, let's update the last timestamp to current one.
 		intlog.Printf(
 			ctx,
-			`too much delay, last timestamp "%d", current "%d"`,
-			lastTimestamp, currentTimestamp,
+			`too much latency, last timestamp "%d", current "%d", latency "%d"`,
+			lastCheckTimestamp, currentTimestamp, currentTimestamp-lastCheckTimestamp,
 		)
-		lastTimestamp = currentTimestamp
+		lastCheckTimestamp = currentTimestamp
 	}
-	s.lastTimestamp.Set(lastTimestamp)
-	return lastTimestamp
+	s.lastCheckTimestamp.Set(lastCheckTimestamp)
+	return lastCheckTimestamp
 }
diff --git a/os/gcron/gcron_schedule_next.go b/os/gcron/gcron_schedule_next.go
new file mode 100644
index 000000000..80a132120
--- /dev/null
+++ b/os/gcron/gcron_schedule_next.go
@@ -0,0 +1,79 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gcron
+
+import (
+	"time"
+)
+
+// Next returns the next time this schedule is activated, greater than the given
+// time.  If no time can be found to satisfy the schedule, return the zero time.
+func (s *cronSchedule) Next(lastMeetTime time.Time) time.Time {
+	if s.everySeconds != 0 {
+		var (
+			diff  = lastMeetTime.Unix() - s.createTimestamp
+			count = diff/s.everySeconds + 1
+		)
+		return lastMeetTime.Add(time.Duration(count*s.everySeconds) * time.Second)
+	}
+
+	var currentTime = lastMeetTime
+	if s.ignoreSeconds {
+		// Start at the earliest possible time (the upcoming minute).
+		currentTime = currentTime.Add(1*time.Minute - time.Duration(currentTime.Nanosecond())*time.Nanosecond)
+	} else {
+		// Start at the earliest possible time (the upcoming second).
+		currentTime = currentTime.Add(1*time.Second - time.Duration(currentTime.Nanosecond())*time.Nanosecond)
+	}
+
+	var (
+		loc       = currentTime.Location()
+		yearLimit = currentTime.Year() + 5
+	)
+
+WRAP:
+	if currentTime.Year() > yearLimit {
+		return currentTime // who will care the job that run in five years later
+	}
+
+	for !s.checkMeetMonth(currentTime) {
+		currentTime = currentTime.AddDate(0, 1, 0)
+		currentTime = time.Date(currentTime.Year(), currentTime.Month(), 1, 0, 0, 0, 0, loc)
+		if currentTime.Month() == time.January {
+			goto WRAP
+		}
+	}
+	for !s.checkMeetWeek(currentTime) || !s.checkMeetDay(currentTime) {
+		currentTime = currentTime.AddDate(0, 0, 1)
+		currentTime = time.Date(currentTime.Year(), currentTime.Month(), currentTime.Day(), 0, 0, 0, 0, loc)
+		if currentTime.Day() == 1 {
+			goto WRAP
+		}
+	}
+	for !s.checkMeetHour(currentTime) {
+		currentTime = currentTime.Add(time.Hour)
+		currentTime = currentTime.Truncate(time.Hour)
+		if currentTime.Hour() == 0 {
+			goto WRAP
+		}
+	}
+	for !s.checkMeetMinute(currentTime) {
+		currentTime = currentTime.Add(1 * time.Minute)
+		currentTime = currentTime.Truncate(time.Minute)
+		if currentTime.Minute() == 0 {
+			goto WRAP
+		}
+	}
+
+	for !s.checkMeetSecond(lastMeetTime, currentTime) {
+		currentTime = currentTime.Add(1 * time.Second)
+		if currentTime.Second() == 0 {
+			goto WRAP
+		}
+	}
+	return currentTime.In(loc)
+}
diff --git a/os/gcron/gcron_z_unit_schedule_test.go b/os/gcron/gcron_z_unit_schedule_test.go
index d0efb61de..5bb5ef60f 100644
--- a/os/gcron/gcron_z_unit_schedule_test.go
+++ b/os/gcron/gcron_z_unit_schedule_test.go
@@ -24,15 +24,14 @@ func TestSlash(t *testing.T) {
 	}
 	gtest.C(t, func(t *gtest.T) {
 		for _, c := range runs {
-			sched, err := newSchedule(c.spec)
+			s, err := newSchedule(c.spec)
 			if err != nil {
 				t.Fatal(err)
 
 			}
-			t.AssertEQ(sched.weekMap, c.expected)
+			t.AssertEQ(s.weekMap, c.expected)
 		}
 	})
-
 }
 
 func TestNext(t *testing.T) {
@@ -82,19 +81,26 @@ func TestNext(t *testing.T) {
 		{"Mon Jul 9 23:35 2012", "@daily", "Tue Jul 10 00:00:00 2012"},
 		{"Mon Jul 9 23:35 2012", "@midnight", "Tue Jul 10 00:00:00 2012"},
 		{"Mon Jul 9 23:35 2012", "@hourly", "Tue Jul 10 00:00:00 2012"},
+
+		// Ignore seconds.
+		{"Mon Jul 9 23:35 2012", "# * * * * *", "Mon Jul 9 23:36 2012"},
+		{"Mon Jul 9 23:35 2012", "# */2 * * * *", "Mon Jul 9 23:36 2012"},
 	}
 
 	for _, c := range runs {
-		sched, err := newSchedule(c.spec)
+		s, err := newSchedule(c.spec)
 		if err != nil {
 			t.Error(err)
 			continue
 		}
 		// fmt.Printf("%+v", sched)
-		actual := sched.Next(getTime(c.time))
+		actual := s.Next(getTime(c.time))
 		expected := getTime(c.expected)
 		if !(actual.Unix() == expected.Unix()) {
-			t.Errorf("%s, \"%s\": (expected) %v != %v (actual)", c.time, c.spec, expected, actual)
+			t.Errorf(
+				"%s, \"%s\": (expected) %v != %v (actual)",
+				c.time, c.spec, expected, actual,
+			)
 		}
 	}
 }