where is the time zone change from eastern to central
Eastern Time Zone The boundary 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.[6]
Atlantic Time Zone In Canada, the provinces of New Brunswick,[1] Nova Scotia,[2] and Prince Edward Island reckon time specifically as an offset of 4 hours from Greenwich Mean time (GMT-4). Small portions of Quebec (eastern Côte-Nord and the Magdalen Islands) are also part of the Atlantic Standard Time Zone. Officially, the entirety of Newfoundland and Labrador observes Newfoundland Standard Time,[3] but in practice most of Labrador uses the Atlantic Standard Time Zone.