date format wrong

Hi,

every time I try to add a new event I got this message:

Fatal error: Uncaught exception ‘Exception’ with message ‘The following date time ‘7 April, 2015 12:28 pm’ can not be parsed by PHP due to it’s formatting.
You may need to choose a more standard date time format. Please check your WordPress Settings.’ in D:\xampp\htdocs\sefip2015\wp-content\plugins\event-espresso-decaf\core\db_models\fields\EE_Datetime_Field.php:628 Stack trace: #0 D:\xampp\htdocs\sefip2015\wp-content\plugins\event-espresso-decaf\core\db_models\fields\EE_Datetime_Field.php(261): EE_Datetime_Field->_set_date_obj(‘7 April, 2015 1…’, ‘UTC’) #1 D:\xampp\htdocs\sefip2015\wp-content\plugins\event-espresso-decaf\core\db_classes\EE_Base_Class.class.php(874): EE_Datetime_Field->prepare_for_set_with_new_time(‘8am’, 1428409706) #2 D:\xampp\htdocs\sefip2015\wp-content\plugins\event-espresso-decaf\core\db_classes\EE_Base_Class.class.php(837): EE_Base_Class->_set_date_time(‘T’, ‘8am’, ‘DTT_EVT_start’) #3 D:\xampp\htdocs\sefip2015\wp-content\plugins\event-espresso-decaf\core\db_classes\EE_Datetime.class.php(133): in D:\xampp\htdocs\sefip2015\wp-content\plugins\event-espresso-decaf\core\db_models\fields\EE_Datetime_Field.php on line 628

Thank you for your help.

https://ww.wp.xz.cn/plugins/event-espresso-decaf/