Depends on how you ship it and if Canada Customs or Canada Post loses it. My record? Three months, discounting the one or two that never showed at all. Absolutely never ship surface, several months minimum and a much higher percentage of no shows. I usually ship either UPS expedited (2 to 4 days) or Royal Mail tracked and signed (5 to 14 days).
Do not ask them to mark a lower value. Canada Customs is not stupid and you just throw the calendar away if they do an inspection, and worse, find something wrong.