>>> one is validity of the issued visa of entry to Canada and the other is the validity of the stay in Canada WHERE ARE THOSE DATES, bro/sis. Thaha_Payen. There are Date of Issue : 07/08/2006 and Expiry Date: 12/01/2008 The graduate faculty has written, "This acceptance is valid from the Spring/Summer 2006 semester to the Winter 2007 semester. You are expected to start your program within this time".