I have sent calendars (mostly to a few overseas people, occasionally in this country but not nearby) to people in the past, and my grandma sent and received a few too, but not enough for it to be a tradition - more a useful, attractive & easy to post gift for someone. I have also given close relatives calendars sometimes with pop stars, cats or whatever on them. I helped my grandfather one year to send some of Scotland to his European friends - they exchanged them every year (so more of a tradition that one, not sure which side initiated it). Unless they are very pretty ones, from a specific place, I don't bother with paper calendars now so am giving even less of them as presents.