"Blue Christmas" and "Longest Night" services are related phenomena that respect the worship needs of mourners, depressed or distressed people. Or more generally, those for whom the cheer of the season brings more pain than joy.
But it's not easy to find these services if you're not looking for them, and some are well before Christmas.
If you know of a service (or are hosting one), feel free to note it here. Not that this will create a catalog, but perhaps will attract people to the idea and prompt them to plan for next year.