Kisd Calendar 24 25 Printable – Killeen isd students will start the school year on wednesday, august 14, 2024, and end the school year on thursday, may 22, 2025. *all students will be released earlier than their normal dismissal times. Not only is our kisd calendar visually appealing, but it is. December s m t w t f s 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31] dec.