According to the notice released by USST, please be noted that
The Tomb-sweeping Day: No teaching arrangement from April 4th (Thursday) to April 6th(Saturday). April 7th (Sunday) is the teaching day as compensation following the schedule of April 5th (Friday).
The Labour Day: No teaching arrangement from May 1st (Wednesday) to May 5th (Sunday). April 28th (Sunday) is the teaching day as compensation following the schedule of May 2nd (Thursday). May 11th (Saturday) is the teaching day as compensation following the schedule of May 3th (Friday).