Here are some resources that may help you with this project:

Kathy Cassidy shared 2 projects which she has done on traditions and rituals:

Jennifer Wagner has a wonderful ning that lists other collaborative projects. (Thank you for posting our project!)

Thank you to Kathy Cothran for sharing this project through her mailing list. Kathy has a variety of resources, including holiday resources for teachers, listed at her web page:

Article on Holiday Traditions: