The Alvin ISD board of trustees approved the student calendar for the 2018-2019 school year during the January board meeting. The 2018-2019 school year will begin on Aug. 16 and will end on May 24. Here are the important dates to know: Aug. 16 - School starts Sept. 3 - Labor Day holiday Oct. 12 - Staff collaboration day, no school Oct. 15 - No school Nov. 19-23 - Thanksgiving holiday Dec. 20 - Early dismissal Dec. 24-Jan 4 - Christmas holiday Jan. 21 - Martin Luther King Jr. Day holiday Feb. 15 - Staff collaboration day, no school Feb. 18 - President's Day holiday March 11-15 - Spring Break April 19-22 - Easter holiday May 24 - last day of school, early dismissal day The schedule shows students enrolled for 173 days of the year for 77,390 minutes total for high school students, 76,495 minutes for junior high students and 76,515 minutes for elementary students. This schedule allows for extra minutes in case of bad weather.