Well, I missed it. Did you?
Wednesday, September 24th was National Punctuation Day. I didn’t celebrate because I just found out about it today, Friday.
I suspect you could still use this free resource next week or even later with the hope that students will remember the proper skills in their writing because you celebrated, even after the fact.
[Yes, I know. Punctuation isn’t really about open source software, but you don’t have to pay to use punctuation! Punctuation is part of our cultural commons. Knowing how to use it correctly improves our lives.]