09/26/1935
https://www.presidency.ucsb.edu...
"Compensation for employment during such official hours of duty in excess of forty hours in any administrative workweek may be paid at the rate of one and one-half times such employee's regular rate of..."
"The administrative workweek, as herein contemplated, shall begin on Monday and run to Sunday, inclusive."
"It shall be the policy of the Chairman of the National Advisory Committee for Aeronautics to hold overtime work to a minimum consistent with the requirements of the national-defense program."
"I hereby proclaim that the provisions of my proclamation of September 5, 1939, are suspended, effective immediately."