This app was mentioned in 8 comments, with an average of 2.13 upvotes
Download Santa Tracker. It's a nice app, by Google, that allows you to count the days until Christmas, play some fun minigames, and track Santa's flight path on a live map on Christmas day. Also, the app just looks really cute and well done. Even if you don't have kids, you should still consider downloading the app.
Some other things you can do to get in the spirit are change your ringtone or notification sounds to be Christmas songs or bells. If you're rooted, you might be able to find some nice holiday-themed boot animations. I know that Motorola devices have had official holiday boot animations that were pushed out to Moto devices around Christmas in the past.
Auf den Spuren des Weihnachtsmanns hat viele Mini-Spiele.
https://play.google.com/store/apps/details?id=com.google.android.apps.santatracker
Stranger Things ist ein solides Adventure.
Frozen Bubble.
Google Santa Tracker App (for Android)
Here's the link to the watch face https://play.google.com/store/apps/details?id=com.google.android.apps.santatracker&hl=en
It's actually 2 watch faces, Elf and Santa
Well what'd'ya know, this was updated yesterday https://play.google.com/store/apps/details?id=com.google.android.apps.santatracker
But I don't see the VR mode.
I just use the faces with Google's Santa Tracker https://play.google.com/store/apps/details?id=com.google.android.apps.santatracker