My brother has taken over making our family calendars. It's an old tradition where we print up calendars with photos of everyone in the extended family each month who has a birthday or anniversary. The first year he did it, a couple years ago, all of the Muslim holidays were printed. I gave him so much shit for it. Our family isn't Muslim and we don't celebrate or recognize any of the holidays. They were just "on the default list" and he saw nothing wrong with keeping them.

Next year they were gone, though.