Summer days are slowly coming to an end. However, you can begin by getting ready for the first day! The first day of school is Monday, September 13th. School will begin 8:15 am sharp. P.S. 3 is a uniform school. Grades 3K through 4th, uniform tops are yellow and bottoms are navy blue. Fifth grade uniforms are white tops and black bottoms. You can go to the Academics tab of this website to view your child's supply list.