The Return Of Roller Derby
When: Saturday, 6 p.m. to 10 p.m.
Where: Triwood Arena
After a long break, Roller derby is back in Calgary! CRDA’s house teams are ready to roll again…. The home season kicks off with last year’s season champs The Thrashin’ Lassies, up against the ever impressive underdogs, the B52 Bellas. Tickets $10 in advance, $15 at the door.

2010 Annual Pitch n’ Hitch A Night Of Impact
When: Friday
Where: BMO Centre, Stampede Park
Enjoy dinner, a live and silent auction and more with proceeds supporting Impact Society’s HEROES program and their About Face partnership with the Calgary Police Service.

President’s ACAD Smart Night
When: Saturday, 6 p.m.
Where: Hyatt Regency Hotel, 700 Centre St. S.E.  
The Alberta College of Art + Design is pleased to announce that bestselling author Chip Heath will be the keynote speaker at the fourth annual President’s ACAD Smart Night. Tickets: $300.

The Calgary Woman’s Show
When: Saturday & Sunday
Where: BMO Centre
Now in it’s 28th year, discover all that is fabulous in fashion, food, fitness and fun for all the layers of your life. Tickets: $13 at the door; $10 seniors & students.

Earth Day Celebrations
When: Saturday
Where: Calgary Zoo, 1300 Zoo Rd. N.E.
The Calgary Zoo is your conservation leader. See how they have transformed the ENMAX Conservatory with all the latest energy conservation technologies which has afforded this building a Gold LEED status.

Calgary Comic and Entertainment Expo
When: Saturday & Sunday
Where: BMO Centre, Stampede Park
The Calgary Comic & Entertainment Expo was born in 2006 and has become the single largest event of its kind across all of Western Canada. Enjoy the main exhibit hall, celebrity panels, workshops, the costume contest, charity auction and more. Tickets” $20 to $30.