The Great Glebe Garage Sale is like Christmas. It is organized by the Glebe Community Association and held every year on the Saturday after Victoria Day (that is, the Saturday following the third Monday in May). For 2002, the date is May 25, from 9 a.m. to 3 p.m. If there's a major rain problem the event will be held the following day. As its purpose is to raise money for the Ottawa Food Bank, vendors are encouraged to donate 10% of their day's sales. About CAD$10,000 is raised each year.
So, it should be tomorrow if there is no rain.
Good Luck everyone!