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The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d with OpenStreetMap data, using open source software. [1] This is a list of time zones from release 2025a of the tz database. [2]
This map depicts observed time zones and observed time zone boundaries, some of which differ from those defined by provincial and territorial legislation. In areas with no road network and no inhabitants, the map falls back to using legislated time zone boundaries. The winter and summer time zone abbreviations shown on the map are consistent ...
The divisions between time zones are based on proposals by Scottish Canadian railway engineer Sandford Fleming, who pioneered the use of the 24-hour clock, the world's time zone system, and a standard prime meridian. [2]
The system has not been directly adopted, but some maps divide the world into 24 time zones and assign letters to them, similarly to Fleming's system. [21] World map of time zones in 1928. By about 1900, almost all inhabited places on Earth had adopted a standard time zone, but only some of them used an hourly offset from GMT.
Time zones were therefore a compromise, relaxing the complex geographic dependence while still allowing local time to be approximate with mean solar time. Railroad managers tried to address the problem by establishing 100 railroad time zones, but this was only a partial solution to the problem.
UTC−08:00 (Zone 4 or Northwest Zone) – State of Baja California UTC−07:00 (Zone 3 or Pacific Zone) – States of Baja California Sur, Chihuahua, Nayarit, Sinaloa and Sonora UTC−06:00 (Zone 2 or Central Zone) – Most of Mexico UTC−05:00 (Zone 1 or Southeast Zone) – State of Quintana Roo: Time in Mexico: Chile: 3: UTC−06:00 ...
Current time for most counties: 08:19, February 19, 2025 CST Current time for El Paso and Hudspeth counties: 07:19, February 19, 2025 MST [ refresh ] Most of Texas is in the Central Time Zone with the exception being the two westernmost counties.
Date/Time Thumbnail Dimensions User Comment; current: 12:56, 26 November 2024: 1,789 × 970 (855 KB): Heitordp: Adjusted Ukraine and Georgia per discussion here: 05:27, 15 October 2024