I will be furious!!

I have worked every single holiday for the past 2 years at my job except this last 4th of July. My other coworkers all get holidays off. If they don't give me 1 day off to attend my family Christmas party that is before Christmas I am going to have a come apart! They even scheduled me to work on my wedding day. Thankfully my coworker switched shifts with me, but it took me almost 3 days to talk her into it.