Queen Victoria's birthday is actually May 24. The statutory holiday in Canada is the last Monday before May 25 of each year. This is a distinctly Canadian holiday.
Victoria Day marks a number of things in Canada. We never used to plant anything until after this weekend. It is the weekend that a lot of us mark as the transition from spring to summer where lots of us rush out for the first camping or fishing weekend of the year. It is a time for us to shake off the last vestiges of cabin fever from winter and get out into the outdoors.
To me it is also a rememberance our history with Great Britain. I wish everyone had as great a long weekend as I did.