diff --git a/convert/time.go b/convert/time.go
index dc36912b..c923e955 100644
--- a/convert/time.go
+++ b/convert/time.go
@@ -15,6 +15,7 @@ import (
 )
 
 // String2Time converts a string to time with original location
+// be aware for time strings (HH:mm:ss) returns zero year (LMT) for converted location
 func String2Time(s string, originalLocation *time.Location, convertedLocation *time.Location) (*time.Time, error) {
 	if len(s) == 19 {
 		if s == utils.ZeroTime0 || s == utils.ZeroTime1 {
@@ -32,6 +33,7 @@ func String2Time(s string, originalLocation *time.Location, convertedLocation *t
 			return nil, err
 		}
 		dt = dt.In(convertedLocation)
+		dt.IsZero()
 		return &dt, nil
 	} else if len(s) == 25 && s[10] == 'T' && s[19] == '+' && s[22] == ':' {
 		dt, err := time.Parse(time.RFC3339, s)
@@ -48,7 +50,7 @@ func String2Time(s string, originalLocation *time.Location, convertedLocation *t
 		dt = dt.In(convertedLocation)
 		return &dt, nil
 	} else if len(s) >= 21 && s[19] == '.' {
-		var layout = "2006-01-02 15:04:05." + strings.Repeat("0", len(s)-20)
+		layout := "2006-01-02 15:04:05." + strings.Repeat("0", len(s)-20)
 		dt, err := time.ParseInLocation(layout, s, originalLocation)
 		if err != nil {
 			return nil, err
@@ -65,6 +67,18 @@ func String2Time(s string, originalLocation *time.Location, convertedLocation *t
 		}
 		dt = dt.In(convertedLocation)
 		return &dt, nil
+	} else if len(s) == 8 && s[2] == ':' && s[5] == ':' {
+		currentDate := time.Now()
+		dt, err := time.ParseInLocation("15:04:05", s, originalLocation)
+		if err != nil {
+			return nil, err
+		}
+		// add current date for correct time locations
+		dt = dt.AddDate(currentDate.Year(), int(currentDate.Month()), currentDate.Day())
+		dt = dt.In(convertedLocation)
+		// back to zero year
+		dt = dt.AddDate(-currentDate.Year(), int(-currentDate.Month()), -currentDate.Day())
+		return &dt, nil
 	} else {
 		i, err := strconv.ParseInt(s, 10, 64)
 		if err == nil {
diff --git a/convert/time_test.go b/convert/time_test.go
index 4b1c2279..d7a9d5ad 100644
--- a/convert/time_test.go
+++ b/convert/time_test.go
@@ -15,7 +15,7 @@ func TestString2Time(t *testing.T) {
 	expectedLoc, err := time.LoadLocation("Asia/Shanghai")
 	assert.NoError(t, err)
 
-	var kases = map[string]time.Time{
+	cases := map[string]time.Time{
 		"2021-08-10":                          time.Date(2021, 8, 10, 8, 0, 0, 0, expectedLoc),
 		"2021-07-11 10:44:00":                 time.Date(2021, 7, 11, 18, 44, 0, 0, expectedLoc),
 		"2021-07-11 10:44:00.999":             time.Date(2021, 7, 11, 18, 44, 0, 999000000, expectedLoc),
@@ -25,12 +25,13 @@ func TestString2Time(t *testing.T) {
 		"2021-06-06T22:58:20.999+08:00":       time.Date(2021, 6, 6, 22, 58, 20, 999000000, expectedLoc),
 		"2021-06-06T22:58:20.999999+08:00":    time.Date(2021, 6, 6, 22, 58, 20, 999999000, expectedLoc),
 		"2021-06-06T22:58:20.999999999+08:00": time.Date(2021, 6, 6, 22, 58, 20, 999999999, expectedLoc),
-		"2021-08-10T10:33:04Z":                time.Date(2021, 8, 10, 18, 33, 04, 0, expectedLoc),
-		"2021-08-10T10:33:04.999Z":            time.Date(2021, 8, 10, 18, 33, 04, 999000000, expectedLoc),
-		"2021-08-10T10:33:04.999999Z":         time.Date(2021, 8, 10, 18, 33, 04, 999999000, expectedLoc),
-		"2021-08-10T10:33:04.999999999Z":      time.Date(2021, 8, 10, 18, 33, 04, 999999999, expectedLoc),
+		"2021-08-10T10:33:04Z":                time.Date(2021, 8, 10, 18, 33, 0o4, 0, expectedLoc),
+		"2021-08-10T10:33:04.999Z":            time.Date(2021, 8, 10, 18, 33, 0o4, 999000000, expectedLoc),
+		"2021-08-10T10:33:04.999999Z":         time.Date(2021, 8, 10, 18, 33, 0o4, 999999000, expectedLoc),
+		"2021-08-10T10:33:04.999999999Z":      time.Date(2021, 8, 10, 18, 33, 0o4, 999999999, expectedLoc),
+		"10:22:33":                            time.Date(0, 1, 1, 18, 22, 33, 0, expectedLoc),
 	}
-	for layout, tm := range kases {
+	for layout, tm := range cases {
 		t.Run(layout, func(t *testing.T) {
 			target, err := String2Time(layout, time.UTC, expectedLoc)
 			assert.NoError(t, err)