Minn. Stat. § 645.071: STANDARD OF TIME.

Every mention of, or reference to, any hour or time in any law is to be construed with reference to and in accordance with the standard time or advanced standard time provided by federal law. No department of the state government and no county, city or town shall employ any other time or adopt any ordinance or order providing for the use of any other time than the federal standard time or advanced standard time.