If I remember correctly, Kirby: Right Back at Ya! didn't have a Christmas special (although it did have a New Years' episode).
Super Mario Boards
YoshiFlutterJump
zel
a russian cartoon didnt have a christmas episode necessarily but it did have multiple new year ones. this is because we celebrate new year instead of christmas here
Superchao
to be fair, a lot of people celebrate christmas without attaching religious significance to it, instead just using it as a gift-giving time
Xiahou Ba
@ZelenPixel isn't New Year technically the same as Christmas anyway? The only thing I know about New Year in Russia are those awful Yolki movies and they have similar vibes to Christmas celebrated here.
Xiahou Dun
Christmas isn't necessarily a Christian holiday. It borrowed a lot of pagan elements that long predated Christianity.