I wish the Calendar app had a Control Center button that showed the current date. I suppose I could build it myself now.

Prototyped the Control Center button I’d like. It’s dead simple.

Now, will iOS actually refresh my control often enough for this to provide utility? I doubt it, but I will find out through testing. If not, I’ll have to update it through push notifications, and I probably don’t want to go down that route.

My Control Center button didn't update the date it displays during the night. It wasn't updated until I interacted with the button. So, having this ControlValueProvider isn't enough for it to update its value periodically. I guess I'll need to send the device a push notification every hour or so to have the date updated.
@simonbs can you on click queue local notifications for the next day or two? That could get you 90 % there
@cton I'm unsure if that'll actually work. Have you tested it?
@simonbs no, just an idea I’ve had. I wouldn’t be surprised if it didn’t work