I had no idea this was even being done, but here you have it.

US Dates, States, and Locations are covered here: http://www.funimation.com/rojas/blog/trigun-badlands-rumble-us-theater-dates/125221

If you're in Canada, the only date to remember is June 22nd. The schedule is here: http://www.animenewsnetwork.com/news/2011-06-02/trigun-film-canadian-theaters-listed