Goto google page:
http://support.google.com/calendar/answer/3033039
Fill related information, then get following link:
http://www.google.com/calendar/event?action=TEMPLATE&text=Event%20Title&dates=20140426T040000Z/20140426T050000Z&details=Event_detail&location=Event_location&trp=false&sprop=&sprop=name