See title.
Suggest alternate holidays and how they could come about.
Examples:
El Mes de los Muertos y Ramadán
(The Month of the Dead and Ramadan)
A holiday celebrated in Navatlaca, a mix of native Aztec festival and Ramadan. Feast, fast, dress up, etc.
Bombardier's Day
A day honoring the artillery forces of both sides of the Second Mexican-American War.