April 5 is Tomb Sweeping Day in China. It is a holiday to honor one's ancestors, clean their tombs as it were. Many Chinese actually choose to do the ritual earlier to avoid crowds.
April 5 is on a Tuesday this year. TKIC will get that day off. However, he has to go to Kindergarten this Saturday to make up for that day. So often a holiday is not a holiday here in China because many have to work weekends to make up for the holiday day off.