Just opened my work app to double check that I had Saturday off on a whim- only to see that they had added an 8:30-4:00 shift on Saturday (and changed my 12:00-6:00 Sunday shift to that slot as well). As of Thursday (yesterday) morning, I did not work Saturday. I received no notification of this change- no text or call or in-person word from my manager. I’ve been fuming about this all morning. Any advice on how to call out from this without burning any bridges- because the impulsive angry part of me wants to tell them to eat me.