I am trying to pass date value to API call but API wouldn't accept the formation that is already set in creator So I need to convert it to respective format. 

Actual Date format in Creator :  11-August-2015 15:59:30

API call Format :                      :  2015-08-11 15:59:30

Can anyone please help me how do I convert the creator format to API format

Thanks

Arfater