Once again the University of Waterloo is having their annual weather contest: First day of the year when it reaches 20C. (at the UoW weather centre) It has been as early as March 8 @ 12PM and as late as April @ 2:15PM. Slots are limited, so enter if you want.
You have to pick-up your prize if you accurately predict the date and time that we hit 20C, so it may not be worth your while if you're in Vancouver, Halifax or the Centre of the Universe. (Toronto) Although if you're from there, GO Transit (both train and bus) stop in Kitchener (train and bus) and Waterloo (bus stops right in the University)...
I choose April 4th at 3:00PM. I would have chosen 1:30 or something, but spot was already taken... --
If you can't explain it simply, you don't understand it well enough. - Albert Einstein