I found a great date time picker based on jQuery-ui http://trentrichardson.com/examples/timepicker/, but suddenly realized that i can\'t modify date format... Tried somethin
Yes it is possible, have a look at the dateFormat option in the API Documentation for the datepicker
dateFormat
This will work,
jQuery('.datetimepicker').datetimepicker({ timeFormat: 'HH:mm', dateFormat: "yy-mm-dd" });