After a little discussion and some information about how wordpress.com functions from mesanna I’ve quite quickly made the first demo version of a generated button. And here it is.
So far it’s really just proof of concept, and its code is a little limited but could very easily and quickly be improved, depending on what information you actually wanted to share. The reason I’ve put the date in for now is because it’s the simplest way to show the principle involved here. The date comes from the php function of the same name in this case I used: