Happy Canada Day! ocmbr_admin June 29, 2018 What's New Your Greater Oshawa Chamber of Commerce is now closed for the Canada Day long weekend, and will re-open Tuesday, July 3 at 9 a.m. Have a safe and happy holiday weekend! You Might Also Like COPR Report May 9, 2009 Proposed Increase To EI Premiums: A Burden On Business October 3, 2010 How To Grow Your Business Was The Focus Of Spring Market Showcase April 20, 2016