Christmas Beginning: What were those presents, and how did Christmas Day shape up for out two heroes?
New Year's Slowly: After letting the cat out of the bag, Mulder and Scully spend the week between Christmas and New Year’s together.
Post-eps for How the Ghosts Stole Christmas.
Continuing with the Christmas theme, here's some Diehard. Season 6, post HTGSC, Bill Scully Jr gives his sister grief about a certain partner, causing Scully to leave and return to said partner. Tried and tested plot with tried and tested results. 😉