Every individual public school is a part of a school system, and if your child's school is in a public school system, the calendar with vacations, work days, etc., is set by the central office.  Thus, to find the answer to your question, go directly to your school or the school system central office.

If your school is a private school, once again go directly to the school's main office.  

Regardless if the school is public or private, you should be able to get a copy of the school calendar for the rest of the year as well.

Best wishes!