I’ve seen several requests for various date pickers inside TextExpander. I’ve created a Snippet that gives you a library of pickers you can add to your own Snippets. Subscribe to the Community Snippets Public Group and check out the Date Picker Snippet, abbreviation com.pickerdate.
This Snippet isn’t really designed to be expanded. Instead, the ideas is to give you multiple pickers that you can copy and then paste into your own Snippet. You can click on a bubble, copy it, and then paste it into the Snippet editor of another Snippet.
I hope you find this helpful!