The Central Time Zone is a time zone in parts of Canada, the United States, Mexico, Central America, some Caribbean Islands, and part of the Eastern Pacific Ocean. Time in the zone is six hours behind Coordinated Universal Time (Greenwich Mean Time - GMT). During daylight saving time (DST), time in the zone is five hours behind GMT.
The province of Manitoba is the only province or territory in Canada that observes Central Time in all areas.
The following Canadian provinces and territories observe Central Time in the areas noted, while their other areas observe Eastern Time:
Also, most of the province of Saskatchewan is on Central Standard Time year round. Because Saskatchewan is wholly within the Mountain Time Zone, it is effectively on DST year round. Major exceptions include Lloydminster, a town situated on the boundary between Alberta and Saskatchewan where the town charter stipulates that it shall observe Mountain Time and DST, putting the town on the same time as all of Alberta, including the major cities of Calgary and Edmonton.
The Central Time Zone is the second most populous after the Eastern Time Zone. Many states straddle time zone boundaries.