Took Black Friday Off But Now Boss Needs Me to Work

Dear Experts, I never take Black Friday off but this year I decided to so I could spend the day with family. My boss gave me permission three weeks ago to take this day off from work. He even said he was going to take it off as well. Yesterday, my boss sent me an e-mail requesting I change my plans and take Monday off instead. He says he'll be working on Friday and would prefer to have me there 'in case' he needs my help. How do I politely explain to my boss I want this day off? Is there any nice way to decline a request from your boss? Should I just go to work? Ugh, the holidays can be so frustrating! Here is how our CAREEREALISM-Approved Experts answered this question on Twitter:Q#384 I would politely (but firmly) let him know that you have already made plans (since he gave you the day off). (@gradversity)Q#384 If it's critical family stuff, explain to boss and take off. If not, score some points and work. Its just a day. (@thejobgenius)Q#384 I'd tell my boss that w/his permission 2 B off, I'd planned things & couldn't cancel on short notice. (@beneubanks)Q#384 Say "So sorry! Made plans w/ family when you gave me day off." If you feel pressure, offer to work 2-3 hrs. (@juliaerickson)Q#384 Be honest. Tell boss U made plans when granted the day off. "Request" implies OK to say NO. OK to have life outside work. (@DawnBugni)Q#384 Nicely explain to ur boss that u already hv plans w family 4 Friday u cannot change. Make urself available via cell. (@DebraWheatman)Our Twitter Advice Project (T.A.P.) is no longer an active campaign. To find an answer to the above question, please use the "Search" box in the right-hand column of this website.