diff --git a/common/Define/Model/Date.php b/common/Define/Model/Date.php
index ff544e2..249b2be 100644
--- a/common/Define/Model/Date.php
+++ b/common/Define/Model/Date.php
@@ -4,7 +4,7 @@ namespace ProVM\Common\Define\Model;
 use Carbon\Carbon;
 
 trait Date {
-  public function date(\DateTime $date) {
+  public function date(\DateTime $date = null) {
     if ($date === null) {
       return Carbon::parse($this->date);
     }
diff --git a/common/Define/Model/DateTime.php b/common/Define/Model/DateTime.php
index abbb9f1..0471f1b 100644
--- a/common/Define/Model/DateTime.php
+++ b/common/Define/Model/DateTime.php
@@ -4,7 +4,7 @@ namespace ProVM\Common\Define\Model;
 use Carbon\Carbon;
 
 trait DateTime {
-  public function date(\DateTime $date_time) {
+  public function dateTime(\DateTime $date_time = null) {
     if ($date_time === null) {
       return Carbon::parse($this->date_time);
     }
diff --git a/common/Define/Model/Time.php b/common/Define/Model/Time.php
index 3cea622..cabc719 100644
--- a/common/Define/Model/Time.php
+++ b/common/Define/Model/Time.php
@@ -4,7 +4,7 @@ namespace ProVM\Common\Define\Model;
 use Carbon\Carbon;
 
 trait Time {
-  public function date(\DateTime $time) {
+  public function time(\DateTime $time = null) {
     if ($time === null) {
       return Carbon::parse($this->time);
     }