With the Magnolia ISD board of trustees approving its 2019-20 academic calendar earlier this week, here is a look at the Tomball ISD calendar for the upcoming school year, which the board of trustees approved last February. TISD trustees moved to approve two years of academic calendars—2018-19 and 2019-20—at once in February 2018. Students in TISD will resume classes Aug. 20 for the first day of school, according to district information. Staff will return Aug. 6 for staff development. The last day of school for students is May 28, 2020, according to district information. Thanksgiving break runs Nov. 25-29 for staff and students, and winter break is Dec. 23, 2019-Jan. 3, 2020, with student holidays Jan. 6-7, 2020, as well. Spring break is March 9-13, 2020, with a holiday for students only March 16, 2020.