Quick check, are you referring to modern Norse paganism and revivals? Im referencing to the northern Germanic/Norse winter celebratory festivals recorded by the Romans in the 1st-5th century CE. Such as: bringing evergreens into dwelling and community centers, putting bright things onto said evergreens as well as in their homes including the extensive use of small candle-type things, as well as the stories of Germanic/proto-Norse male deities/spirits who would travel amongst their peoples during the winter equinox to bring gifts and punishments to those who were deserving of one or the other. This was during the period when Rome was Christianizing (Christianity was the dominant religion in the Roman Empire by 350 CE, give or take a few year) but the Romans, by their own words at the time, weren’t bringing these traditions to the Germanic provinces, they were bringing them back to Rome as bits of non-Roman/non-Christian customs.