Daylight saving time in the Americas is the arrangement in the Americas by which clocks are advanced by one hour in spring and moved back in autumn, to make the most of seasonal daylight. The practice is widespread in North America, with most of Canada and the United States participating, but much less so in Central and South America. North America Canada and the United States Canada and the United States use daylight saving time on a wide scale, with only a few provinces/states, or parts of them, opting out of the practice or adopting it year-round without a twice-yearly switch. The Canadian province of Saskatchewan and the territory of the Yukon do not observe daylight saving time. Saskatchewan remains on Central Standard Time (CST), although, geographically, they are in the Mountain Time Zone, and Yukon remains on Mountain Standard Time (MST) all year long. The US territories of Puerto Rico and the Virgin Islands remain on Atlantic Standard Time (AST) all year long, so clocks in those territories match those in New York City during the summer and Bermuda in the winter. The states of Hawaii and Arizona do not observe daylight saving time. Hawaii stays on Hawaiian Standard time year round, Arizona stays on Mountain Standard time year round. Since 2007, in areas of Canada and the United States in which it is used, daylight saving time begins on the second Sunday of March and ends on the first Sunday of November. On March 15, 2022, the United States Senate passed the Sunshine Protection Act by unanimous consent. If passed by the House of Representatives, the law would place the United States under Daylight Time year-round. Mexico Mexico observed daylight saving time (DST; Spanish: horario de verano) nationwide from 1996 to 2022, even in its tropical regions, because of its increasing economic ties to the United States. It previously observed the schedule used by the United States prior to 2007, with DST beginning on the first Sunday of April and ending on the last Sunday of October. Although the United States changed the schedule for DST beginning in 2007, only certain municipalities in Mexico, located less than 20 km from the border adopted this change. The rest of the country continued to follow the original schedule before abolishing DST on Sunday, 30 October 2022. The border municipalities that changed to observe the U.S. schedule continue to do so,