Below are conferences I like to follow and get the latest information from.  The month listed is an approximation for actual dates for the current year (most likely it was held in that month last year and could change in the future).

January	CodeMash (Ohio)
February	GSMA Mobile World Congress (Barcelona) ConFoo.Ca (Montreal) appsworld (San Francisco) wavefront Wireless Summits (Vancouver)
March
April	Prarie Dev Con (Winnipeg) Microsoft Build (San Francisco)
May	TechEd (North America) (Houston, Texas)    AnDevCon (Boston) Mesh (TOR)
June	Apple WWDC (San Francisco)
July	International Startup Festival
August
September
October	Startup Weekend Ottawa (Ottawa)  GTEC (Ottawa)
November	UX Camp Ottawa (Ottawa)
December	DevTech (Toronto, Montreal, Vancouver)