PWA applications can often be simple, as here, but with a core function that's worth bookmarking, at the very least. In this case, the site/app lets you add important days coming up and remembers them (in local data), presenting them again when relaunched, showing how many days still to go to each event.

So not earth shattering, but useful enough. Thie PWA app is at de-gehret-mydays.firebaseapp.com. Of course, you can turn this into an 'app' yourself with PAWA or just pin it 'as is' on your Start screen. It's up to you.

Not bad at all, though I'd have liked the code to go the extra mile and sort the events with the closest first! Do email me if you spot other really well done PWA sites. So far the Twitter PWA is by far the most sophisticated I've seen, but I'm on the trail of a few others...