Michigan Compiled Laws, Chapter 380. School Code of 1976 § 380.1175

Sec. 1175. (1) January 1, New Year's day; the last Monday of May, Memorial or Decoration day; July 4; the first Monday in September, Labor day; the fourth Thursday of November, Thanksgiving day, and December 25, Christmas day, shall be public holidays in the public schools of this state. If 1 of these days falls on Sunday, the Monday following shall be a public holiday in the public schools. A school session shall not be held on the public holidays described in this subsection in a public school in this state. The salary of a school officer or a teacher shall not be affected by reason of the dismissal of school on the days described in this subsection.

(2) On the third Monday in January in conjunction with the federal holiday, Martin Luther King, Jr. day; February 12, Lincoln's birthday; the third Monday of February, Washington's birthday; September 17, the date of the adoption of the federal constitution; the second Monday in October, Columbus day; and November 11, Veteran's day, a school officer or teacher shall have each school under the officer's or teacher's control observe the day by a proper and appropriate commemorative exercise. A commemorative exercise may include or involve the assignment of schoolwork to teach the significance of the days described in this subsection, which shall not be considered as legal holidays for schools.