I hadn't used the idea in a while, so I brought it back in two ways:
1) Use all the digits in the date to create an equation. The digits should stay in the same order they are in the date, and any operation signs can be added in between any digits. The equal sign can also be placed between any digits.
Digits can be used as exponents, as in the example shown, and you can add square roots signs if you can find a way to use them.
2) The other way I used the dates was to write the date so that students have to solve an expression for each number in the date.
It's been fun to see some students writing these in the corner of their notebooks during class! Others have asked to write their equations on the board during the last period of the day.
I also look at the date-writing as a way to introduce notation my students haven't seen before, like the cube root, as well as reinforcing some concepts, like exponents. I don't know about your students, but mine often forget that 2 cubed means 2 x 2 x 2, not 2 x 3. Using the exponents in the date keeps bringing that concept back for review.
How would you write some of these dates?
Update: I've started posting math dates at the beginning of every week on Instagram (always on Instagram) and Facebook (most weeks on FB), so if you'd like to use them, I hope you'll follow me on one of those platforms (if you aren't already). I'll post the dates on the blog sometimes as well, but not as regularly:-)