Rom 14:5 One man esteemeth one day above another: another esteemeth every day alike. Let every man be fully persuaded in his own mind.
Rom 14:6 He that regardeth the day, regardeth it unto the Lord; and he that regardeth not the day, to the Lord he doth not regard it. He that eateth, eateth to the Lord, for he giveth God thanks; and he that eateth not, to the Lord he eateth not, and giveth God thanks.
These two verses don’t say don’t judge how they celebrate, but that they celebrate.Col 2:16 Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days:
With that being said, if you celebrated some holiday specifically dedicated to a false god, I would definitely judge you and attempt to appeal to you to stop your pagan practices.
Likewise, I do judge certain practices such as Easter bunny, Easter eggs, Santa Claus and other like it. I don’t see anything in Scripture saying we shouldn’t address paganism.
In context, this was discussing Jewish holy days…