Cornwall Holiday celebrates St. Piran Day. This is a made up holiday for Cornwall. Reasons why he celebrates this holiday are unknown. That is the holiday he celebrates.
The day Jesus arose from the dead is called Easter.
Samhain is a Wicca/Celtic Sabbat (holiday) that honors the dead and celebrates the passing of all things bad, and hope for the future.
Easter
Muslims celebrate it
Celebrates African traditions
The holiday of Shavuot celebrates the giving of the Torah and the laws contain therein.
the fourth of july
Carnival.
Juneteeth
Thanksgiving
1st August.