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[Linked Image from comicspriceguide.com]

Another I love for its modest traditional Christmas scenes, in X-MEN 143, the very last issue of the Claremont Byrne/Austin run (Dec 1980, cover-dated March 1981).
With basically a Christmas Eve at home, X-Men style.
A nice couple out in the wilderness selecting and cuting down a Christmas tree to take home (before bad stuff begins to happen), and Kitty Pride taking Peter Rasputin by surprise under the mistletoe, among other scenes.

https://viewcomiconline.com/uncanny-x-men-1963-issue-143/