Okla. Stat. tit. 70, § 70-4516: School calendar

The board of education of any school district operating pursuant

to the provisions of Section 4511 et seq. of this title shall

establish a school calendar whereby the teaching sessions and

vacation periods during the school year are on a rotating basis.

Each selected school shall be closed for all students and

employees on regular school holidays.

The schools and classes shall be conducted for a total of no

less than one hundred eighty (180) days or no less than one thousand

eighty (1,080) hours during the academic year as provided for in

Section 1-109 of this title.

The provisions of all other laws relating to compulsory full-

time education and the enrollment and attendance of pupils in the

kindergarten, elementary and secondary grades shall be applicable

with respect to the regular school days prescribed for the entire

academic year established for the school at which a program pursuant

to Section 4511 et seq. of this title is conducted, and to the

attendance area established for such school.