[Nick Clay]

I've recently noticed that the Calendar app icon on the homescreen of my Samsung Galaxy Tab S 10 changes daily, displaying the number of the day in the month - so now it's a blue opening page with a white "2" in the centre. Whereas on my HTC 10 phone, running exactly the same version of the app (5.7.35-165431130-release) it always stays the same: a blue opening page with a white "31". Furthermore, the phone is running a later version of Android - 7.0 - while the tablet's still on 6.0.1. I do have the Nova launcher on the tablet, but not aware of having set it, or it being capable, for that level of interaction. I'm intrigued.

[B. Diddy]

Welcome to Android Central! It has to do with the launcher. The Tab S and the HTC 10 use different launchers, and HTC's presumably doesn't have the feature to update the Calendar icon. You can always install a 3rd party launcher like Nova Launcher, which has this feature as well.

[chanchan05]

Also, the Calendar app on Samsungs are not the same as Calendar apps on othrr phones. Samsung uses a proprietary Calendar app which also syncs to Samsung Cloud.