South Texas Independent School District Calendar 2026–2027
Mercedes, TX · 5 key dates. Add them all to your phone in one tap, or customize and print.
August 2026
Mon, Aug 17First Day
November 2026
Nov 23 – Nov 27Thanksgiving Break
December 2026
Dec 21 – Jan 8Winter Break
March 2027
Mar 15 – Mar 19Spring Break
May 2027
Fri, May 21Last Day
These dates are compiled from the district's published calendar and may change. Always verify against the official South Texas ISD calendar.