 The Board of Supervisors of the City and County of San Francisco codified the design of the current flag on December 16, 1940.In 1900, banker and art patron Mayor James Duval Phelan, mayor from 1897 to 1902, recommended to the Board of Supervisors of the City and County of San Francisco that San Francisco adopt a flag and motto.A contest was held, and more than one hundred proposals were submitted.