We have 4 quarters in a school year. 

The following are important dates: 

Jan 7, 2023: Winter Quarter starts
Apr 1, 2023: Spring Quarter starts
Jun 25, 2023: Summer Quarter starts
Sept 21, 2023: Fall Quarter starts

The school is closed on the following days: 

Jan 1 - Jan 6th. 
May 27 - May 29th.
July 2 - July 4th.
Nov 23 - Nov 26th
​Dec 18 - Dec 31st.

(Please click on below image to enlarge)