For the most part, Canadians are very literal about time and schedules. If someone says to “come at 3:00″ he usually expects his guest to be there at 3:00. Lateness of more than 15 minutes is considered rude, and an apology or explanation will be expected. Likewise, earliness of more than 15 minutes is usually considered presumptuous and may cause an awkward surprise for a host who is not yet ready.