diff --git a/action_create.go b/action_create.go
index b63d3e6..a4e35a5 100644
--- a/action_create.go
+++ b/action_create.go
@@ -38,7 +38,7 @@ func (s Service) Create(payload CreatePayload) {
 			ID:   payload.Author.ID,
 			Name: payload.Author.Name,
 		},
-		CreatedAt: Now(),
+		CreatedAt: now(),
 	}
 
 	// Insert to db
diff --git a/time.go b/time.go
index 9781914..afcd4b3 100644
--- a/time.go
+++ b/time.go
@@ -10,13 +10,13 @@ import "time"
 
 const timezoneHCM = "Asia/Ho_Chi_Minh"
 
-// GetHCMLocation ...
-func GetHCMLocation() *time.Location {
+// getHCMLocation ...
+func getHCMLocation() *time.Location {
 	l, _ := time.LoadLocation(timezoneHCM)
 	return l
 }
 
-// Now ...
-func Now() time.Time {
-	return time.Now().In(GetHCMLocation())
+// now ...
+func now() time.Time {
+	return time.Now().In(getHCMLocation())
 }