English Grammar for the Utterly Confused - Laurie Rozakis 2003

Capitalize Names of Days, Months, and Holidays
Chapter 11 Capitalization and Abbreviations
Part 4 A Writers Tools

Again, these are all proper nouns, so they are all capitalized.

1. Capitalize names of days.

Monday  Tuesday

Wednesday Sunday

2. Capitalize names of months.

February  March

April   July

3. Capitalize names of holidays.

Thanksgiving Kwanzaa

Passover  Ramadan