Serenity High - School District Calendar - Mckinney Isd - 2021-2022

This Mckinney Isd instructional academic school calendar is extremely important as it keeps you informed of Serenity High grading periods, early dismissal dates, staff development days and holidays for the Serenity High calendar school year 2021-2022. 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 Mckinney Isd 2021-2022 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.