diff --git a/engine.go b/engine.go
index 4691b491..15c619d3 100644
--- a/engine.go
+++ b/engine.go
@@ -1516,8 +1516,8 @@ func (engine *Engine) Import(r io.Reader) ([]sql.Result, error) {
 	return results, lastError
 }
 
-// NowTime return current time
-func (engine *Engine) NowTime(col *core.Column) (interface{}, time.Time) {
+// nowTime return current time
+func (engine *Engine) nowTime(col *core.Column) (interface{}, time.Time) {
 	t := time.Now()
 	var tz = engine.DatabaseTZ
 	if !col.DisableTimeZone && col.TimeZone != nil {
diff --git a/helpers.go b/helpers.go
index 4b62c2d5..f39ed472 100644
--- a/helpers.go
+++ b/helpers.go
@@ -422,7 +422,7 @@ func genCols(table *core.Table, session *Session, bean interface{}, useCol bool,
 
 		if (col.IsCreated || col.IsUpdated) && session.statement.UseAutoTime /*&& isZero(fieldValue.Interface())*/ {
 			// if time is non-empty, then set to auto time
-			val, t := session.engine.NowTime(col)
+			val, t := session.engine.nowTime(col)
 			args = append(args, val)
 
 			var colName = col.Name
diff --git a/session_delete.go b/session_delete.go
index 484d7a36..688b122c 100644
--- a/session_delete.go
+++ b/session_delete.go
@@ -184,12 +184,12 @@ func (session *Session) Delete(bean interface{}) (int64, error) {
 			}
 		}
 
-		// !oinume! Insert NowTime to the head of session.statement.Params
+		// !oinume! Insert nowTime to the head of session.statement.Params
 		condArgs = append(condArgs, "")
 		paramsLen := len(condArgs)
 		copy(condArgs[1:paramsLen], condArgs[0:paramsLen-1])
 
-		val, t := session.engine.NowTime(deletedColumn)
+		val, t := session.engine.nowTime(deletedColumn)
 		condArgs[0] = val
 
 		var colName = deletedColumn.Name
diff --git a/session_insert.go b/session_insert.go
index 40df9bfc..478501f0 100644
--- a/session_insert.go
+++ b/session_insert.go
@@ -126,7 +126,7 @@ func (session *Session) innerInsertMulti(rowsSlicePtr interface{}) (int64, error
 					}
 				}
 				if (col.IsCreated || col.IsUpdated) && session.statement.UseAutoTime {
-					val, t := session.engine.NowTime(col)
+					val, t := session.engine.nowTime(col)
 					args = append(args, val)
 
 					var colName = col.Name
@@ -181,7 +181,7 @@ func (session *Session) innerInsertMulti(rowsSlicePtr interface{}) (int64, error
 					}
 				}
 				if (col.IsCreated || col.IsUpdated) && session.statement.UseAutoTime {
-					val, t := session.engine.NowTime(col)
+					val, t := session.engine.nowTime(col)
 					args = append(args, val)
 
 					var colName = col.Name
diff --git a/session_update.go b/session_update.go
index 14b76bf0..ca062981 100644
--- a/session_update.go
+++ b/session_update.go
@@ -205,7 +205,7 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 		if _, ok := session.statement.columnMap[strings.ToLower(table.Updated)]; !ok {
 			colNames = append(colNames, session.engine.Quote(table.Updated)+" = ?")
 			col := table.UpdatedColumn()
-			val, t := session.engine.NowTime(col)
+			val, t := session.engine.nowTime(col)
 			args = append(args, val)
 
 			var colName = col.Name