It differs depending on where you are but most places in North America have them in June or early July. I know that there are some exceptions though so knowing a general idea of where in Canada you are could help.
British Columbia is a huge amount of land :lol: Try doing a google search for: "Pridefest" (or "gay pride") and the closest large city to you... sometimes including the current year helps too.
I believe the Vancouver one was/is this month. I was thinking of going myself but pretty sure I missed it.
Where I'm at the main Pride event is in June, but there's a couple smaller ones in surrounding towns in July, and even one in September...