The other complication, too, is that there's something called the Paris convention, which Canada already belongs to, as does most of the world. So an application could be filed in a foreign country like the U.S., and that applicant has six months to file in Canada and have the Canadian application treated as though it had been filed on the same date as the U.S. application. So I do my search at three months and I won't find that U.S. company because that person won't have filed or may not have filed yet in Canada.
On May 12th, 2014. See this statement in context.