October 31 - All Hallow's Eve
November 1 - All Saints' Day
November 2 - All Soul's Day
Its a triumvirate that has all the bases covered - Hell, Heaven and what ever is in between. The tradition of All Hallows as a celebration of goblins and ghosties and long legged beasties is an old one going back to the Celts. My Irish ancestors celebrated Samhain around this time of year. As with many pagan festivals it was appropriated by the Christian church in the 8th century and then by global marketing in the 20th.
In the Christian church it was originally a night of fasting and preparation for the Feast of All Saints (All Hallows - All Holy Ones - ergo All Hallows' Eve = Halloween) but the old traditions also said it was the night when spirits and demons roamed the earth freely. The only way to avoid them was to disguise yourself as one of them or to frighten them with something as terrible as themselves. Thus pumpkins (turnips and rutabagas in England?????) were carved with horrible frightening faces.
31 ottobre - La Vigilia d'Ognissanti