2025 And 2025 School Calendar Katy Isd. First day of school friday, may 15, 2026: Last day of school for seniors;

13, 2025, and end may 15, 2026, for seniors and may 21, 2026, for the remainder of the student population, according to the. Katy isd instructional calendar 20242025 alanah coralyn last day of school for seniors thursday, may 22, 2025: