Sims 4
Advent Calendar started
https://sims4.aroundthesims3.com/
Alixdekostube
Sims 4
Advent Calendar
https://alixdekostube.tumblr.com/tagged/advent-calendar
All4SIms
Sims 4
Advent update
http://www.all4sims.de/index.php?page=Thread&threadID=15467
CAS backgrounds
http://www.all4sims.de/index.php?page=Thread&threadID=15470
Simthropology
Sims 4
Birthday countdown
https://simthropology.tumblr.com/tagged/birthday-countdown-19
Dream Central
Sims 4
Advent Calendar
https://raiichuu.tumblr.com/tagged/raiichuus-advent-calendar
Bozena
Sims 4
House
http://thesimsbybozena.blogspot.com/
Sim_plyreality
Sims 4
Poses
https://sim-plyreality.tumblr.com/post/189576952716/my-love-part-2-9-couple-poses-note-these-are
Pixl Monster
Sims 4
Several items
https://pixlmonster.tumblr.com/tagged/ts4cc
Shimydim Sims
Sims 4
Hair
https://www.shimydim.com/
Sweet Cranberry ts4
Poses
https://susna91.wixsite.com/sweetcranberryts4/post/christmas-toys-posepack-in-game
Blacky’s
Sims 4
Clothing, posters, Advent Calendar - Door 9 & 10
http://www.simszoo.de/
Mod the Sims
Sims 4
Calories mod, house, furniture
http://www.modthesims.info/browse.php?gs=4&f=38&showType=2