Lunar Holiday!

Lunar Holiday! My first 3 day weekend! I'm going to get to this place called Tongdongnae which is supposed to be absolutely beautiful. My boss wants to throw a party on Monday (my day off), but honestly, I don't want to go. It's my day off! Her house is literally the kindergarten, she lives on the top floor. I don't want to go back to work on my day off. What should I do?