There have only ever been a handful of daytimers in Canada, and now there's just one - the 1510 in Tillsonburg, Ontario, which has an FM relay running 24/7 anyway.
There were never any daytimers (or, really, any stations at all) way way up north where the daylight hours are as short/long as you think. Most of Canada's population is within 100 miles of the US border, where daylight hours range from 9 hours or so this time of year to 16 hours or so in June.