where is the time zone change from eastern to central
49 CFR 71
title: Eastern Time Zone text: Costa Rica use Central Standard Time year-round. Panama in Central America uses Eastern Standard Time year-round. The state of Acre and the southwest part of the state of Amazonas (both in Brazil), along with Colombia, Ecuador (except for the Galápagos Islands, which uses Central Standard Time), and Peru in South America also use EST year-round. Eastern Time Zone The Eastern Time Zone (ET) is a time zone encompassing part or all of 22 states in the eastern part of the contiguous United States, parts of eastern Canada, the state of Quintana Roo in Mexico, Panama in Central America, and the title: Eastern Time Zone text: between time zones is set forth in the Code of Federal Regulations, with the boundary between the Eastern and Central Time Zones being specifically detailed at 49 CFR 71. Seventeen states and Washington, D.C. are located entirely within the Eastern Time Zone. They are: Five states are partly in the Eastern Time Zone, with the remaining portions in the Central Time Zone. They are: Eastern Time is also used somewhat as a "de facto" official time for all of the United States because it includes the capital city (Washington D.C.), the most populous city (New York City), and half of title: Eastern Time Zone text: Eastern Time Zone The Eastern Time Zone (ET) is a time zone encompassing part or all of 22 states in the eastern part of the contiguous United States, parts of eastern Canada, the state of Quintana Roo in Mexico, Panama in Central America, and the Caribbean Islands. Places that use Eastern Standard Time (EST) when observing standard time (autumn/winter) are 5 hours behind Coordinated Universal Time (). Eastern Daylight Time (EDT), when observing daylight saving time DST (spring/summer) is 4 hours behind Coordinated Universal Time (). In the northern parts of the time zone, on the second Sunday in March, title: Central Time Zone text: Time Zone and the Eastern Time Zone: Most of Mexico—roughly the eastern three-fourths—lies in the Central Time Zone, except for six northwestern states (Baja California, Baja California Sur, Chihuahua, Sinaloa, Sonora, and *most of Nayarit) and one southeastern state (Quintana Roo). The federal entities of Mexico that observe Central Time: Belize, Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua all use Central Standard Time year-round. The Galápagos Islands in Ecuador uses Central Standard Time all year-round; the remainder of Ecuador uses Eastern Standard Time. Both Easter Island and Salas y Gómez Island in Chile uses Central Standard Time during the title: Central Time Zone text: with this change and observes their from the first Sunday in April to the last Sunday in October. In December 2009, the Mexican Congress allowed ten border cities, eight of which are in states that observe Central Time, to adopt the U.S. daylight time schedule effective in 2010. Central Time Zone The North American Central Time Zone (CT) is a time zone in parts of Canada, the United States, Mexico, Central America, some Caribbean Islands, and part of the Eastern Pacific Ocean. Central Standard Time (CST) is behind Coordinated Universal Time (UTC). During summer most of the zone uses daylight