I.S. 239 Mark Twain School - School District Calendar - New York City Geographic District #21 - 2021-2022

This New York City Geographic District #21 instructional academic school calendar is extremely important as it keeps you informed of I.S. 239 Mark Twain School grading periods, early dismissal dates, staff development days and holidays for the I.S. 239 Mark Twain School 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 New York City Geographic District #21 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.