Brain's Big Book of Holiday Terms is a part of Elwood City Celebrates the Holidays, a winter holiday-themed section of the PBS Kids Arthur website. It has facts about the following holidays and activities:
- Baxter Day
- Christmas
- Hanukkah
- Kwanzaa
- New Year
- Ramadan and Eid ul-Fitr
- St. Lucia
- Volunteering
- Winter Solstice