Answer:
I'll be using the country I go by with a lot:
France.
French people (most of them) are Christians. The festivals they know are:
Christmas Eve + Day (12/24 and 12/25) - Giving presents and such
Easter Day (04/09) - Going to church, seeing friends and family
Bastille Day (07/14) - Military parades and fireworks (kind of like the 4th of July in the USA)
Merci.
Daintysword