Working on Easter Day 2017

[Brendan Rowe]

Hi there, so I'm currently 18 years old and working at a Culver's as my first job to earn some money. I recently found out I'm working on Easter and I am a very religious person so I obviously object to that. Management did not notify me that Culver's was open on Easter this year (it was closed last year). Is it legal to fire me based on my religion having a sacred day? Sorry if I sound stupid, I am just trying to work out how not to get fired from not showing up to this shift.