This year has been different though. My school district adopted a new math program, and that program has a component that includes a daily calendar activity. "The Calendar" process is something that kindergarten and first usually do - they count the number of days in school, learn the days/months, and represent the numbers in various ways (coins, tens/ones, etc), but few second grade teachers do because our math is more complex by then. The calendar component in our program goes beyond the "old-school" way and allows for a lot of higher level skills and student discourse. I mostly like it.
I had seen some on Pinterest made out of picture frames, which was the direction I went. I found a cheap frame at Target. After taking the matting out, it had a 14"x18" opening. Many measurement calculations took place to finally narrow down my sizing - 2"x2" squares evenly spaced around a 1-1/2 inch border. I cut down post-it notes to the square size and used them to layout where I wanted everything.
I added little day-of-the-week tags at the time. If I were to do it again, I would have moved everything down a bit in order to center the entire shape.
Once inside the frame, it's completely customizable when using a dry erase marker.
I wish the blue matched the the blue of the boards a little better, but I thought the muted colors would be better to see the marker. I'm happy with how it turned out, and it's made date planning much easier.