There are many. It really depends on the religion, and focus of the particular group. However, many Wiccans and other Pagans observe four to eight seasonal holidays, stemmed from Celtic society....
Eostera (ostara) and Yule. They correspond with Easter and Christmas,and Halloween=(protesant reframation day oct,31,1517 but were there first.) something stinks doesn't it.
Halloween actually was a Celtic holiday, not Roman. The Celts celebrated All Hallow's Eve, a day in which the spirits of the dead could return to the Earth for that day. It also functioned as the...