International H S - School District Calendar - Houston Isd - 2025-2026

This Houston Isd instructional academic school calendar is extremely important as it keeps you informed of International H S grading periods, early dismissal dates, staff development days and holidays for the International H S calendar school year 2025-2026. As a parent and or student, you will find yourself needing this information on a regular basis, so please "like" and bookmark this page in a visible location within your favorite browser. The legend for this Houston Isd 2024-2025 calendar is at the bottom of the page. If you are browsing on your PC there is another copy of the legend in the right hand column.