Chinese universities love:
1) Waiting until the last minute to decide when and how long their holidays will be, and
2) Making up vacation days on the weekend.
Therefore, today (Saturday) is Monday, tomorrow is Tuesday, and the following three days are our Dragon Boat holiday. The first time such scheduling shenanigans happened, I was all, "Whaaaaa?" Now I've been through it a few times so I can be more, "This is how we do."
I'm sure you'll all have wonderful, relaxing weekends while I'm busy working and giving finals. But when Monday rolls around and feels like a Saturday, I'll be the one laughing.