I jest, but I am quite terrible at updating the block calendars we already have.
This is sort of a re-purposing of the classic block calendar. Instead of counting through the days of the month it counts down (from 32) to a specific event. In the case of this build I created them as gifts to announce that the wife was pregnant to our parents and as such it counted down the weeks until they became grandparents. These are pretty easy and cheap to make so doing them as one-offs isn't a big deal and in this case they can reuse them for every other grandchild-to-be so it's not quite a one shot deal, but using some chalkboard, whiteboard, or magnetic paint or stickers, as well as a generic theme, will allow unlimited uses and make great gifts. You could of course use a generic one as a calendar, if you're into that sort of thing. To demonstrate this flexibility I've built a third calendar, with a different base style and decorations, intended for generic use.