Currently, "United States Mountain Standard Time" (MST), defined in federal law as coordinated universal time minus 7 hours, is the standard time within Colorado. During the period of daylight saving time (i.e., the second Sunday in March to the first Sunday in November) time is advanced one hour. Federal law allows a state to stay on standard time year round, but does not currently allow a state to adopt daylight saving time year round.
The bill makes daylight saving time, defined as coordinated universal time minus 6 hours, the year-round standard time within the state, but takes effect only if a federal law is enacted to allow states to remain on daylight saving time year round and at least 4 states in the mountain standard time zone, in addition to Colorado, enact legislation making daylight saving time the states' standard time throughout the year .
(Note: Italicized words indicate new material added to the original summary; dashes through words indicate deletions from the original summary.)
(Note: This summary applies to the reengrossed version of this bill as introduced in the second house.)