Central standard time shall be the official time within the city for the transaction of all city business; except that at 2:00 a.m. on the last Sunday in April of each year official time for the city shall be advanced one hour, and at 2:00 a.m. on the last Sunday of September of the year, or of October as may be provided by action of City Council, such official time provided in this section shall, by retarding of the same one hour, be returned to central standard time; and all legal or official proceedings of the Council and all official business of the city shall be regulated thereby. All clocks or other time pieces in or upon public buildings or other premises maintained at the expense of the municipality shall be set and run according to the official time provided in this section and it is made the duty of the officer or other person having control and charge of such buildings or premises to see that the clocks or other time pieces are set and run in accordance with the official time as provided by this section. All persons residing within the city are hereby requested to set and run any and all clocks or other time pieces under their control within the municipality in accordance with the official time as provided in this section.
('72 Code, § 12.003)