Die, It’s a Wonderful Gremlin Day

The RPG ThinkTank has published a Christmas adventure based on this. At a point in time or when a character dies, they all wake up back at 6am of that day.

The plot can be found here:

The characters awake at 6am on Christmas Morning. (...) The instant a character dies, the entire party once again wakes up at 6am on Christmas Morning to find everything is repeating.

To unravel the mystery and find their way home the characters must save the suicidal man on the bridge, reunite a man with his wife, help a teenage couple defeat the small green monsters and discover the true meaning of love.

I've adapted this myself for a Chrismas Grinch adventure, but I haven't published my adventure yet. Maybe I'll update this post in the future.