Time Zone borders map for North America - Daylight Saving time Time Zone borders map for North America - Standard time Time Zone borders map for North America - Year Round Time Zone Borders map of the United States lower 48 - Daylight Saving time Time Zone Borders map of the United States lower 48 - Standard Time Time Zone Borders map of the United States lower 48 - Year Round
USA (Lower 48):
North America:
Use the above buttons to view alternate maps. Clicking on any map opens it in full resolution, suitable for printing.

OPINION: The current wave of state legislative proposals to to "make daylight saving time permanent" are EXCEPTIONALLY STUPID!

To propose ending daylight saving time is not in itself stupid. It's a legitimate proposal to put to voters or to consider in legislatures. I would support it.

Neither is proposing minor adjustments to time zone borders necessarily stupid. If the the persons in the affected area get a chance to think it through and understand how it will impact their lives and economies, it's a legitimate thing to consider.

But the words "make DST permanent" is the same thing as eliminating daylight saving time while simultaneously and permanently advancing the entire time zone an hour forward year round. Again, this is EXCEPTIONALLY STUPID. In effect it would have current Spring/Summer time remain the same, but it pushes the time forward an hour for Fall and Winter.

This will be extremely disruptive to computer controlled processes. Also to commerce, especially for businesses engaged in interstate and international commerce. Even moreso if in state sharing a border with a state or nation that will not be making such a shift. It would impact activities that depend on the availability of daylight. Yes, some will be positively impacted, some negatively — but shifting an entire time zone a full hour different from current is a terrible proposal.

Look at the time zone borders in the maps above. If individual states start adopting this stupid idea, think about how much more complex the time zone obeservances across the nation will become. Let your state politicians know they should RETHINK this terrible idea.

OnTimeZone.com provides North American time zone data for use in GPS, routing and mapping programs. This can be used in Garmin Basecamp, Garmin Mapsource, Google Maps, Google Earth Microsoft Streets and Trips, and any other software that accepts standard map data.

Data and images are all available via the "Files/Downloads" button on the left navigation bar.

OnTimeZone.com data is limited to North America, including time zone data for the United States, Canada, Mexico, Belize, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica and Panama.

We include local exceptions to time zone observance, including Daylight Saving time rules.

Time zone maps are often wrong, because time zone borders and exceptions change periodically. We track all such changes and make sure we are current. Official chages in US time zone borders were made as recently as November 2010.

Wherever there is a difference between official time zone data, and local time zone observance, we try to show both. (More on that in our "exceptions" page).

We intend to keep the data current. In our change log you will see that we keep very current with any changes to North American time zone borders and observance.

The borders presented here includes recent changes in Indiana, North Dakota and Nayarit Mexico. All official changes through August 2014 are included.

Then there's Daylight Saving Time.

While most of the North America observes DST, there are significant exceptions. Such as Arizona (except for the Navajo reservation), Hawaii, the Mexican state of Sonora, the Canadian province of Saskatchewan, parts of eastern Quebec, and several smaller entities. Details in the "exceptions" page.

Just like time zone deviations, some DST exceptions are official while others are merely local practice. So be warned.

Hopefully this all helps get you where you need to go on time.

Acknowledgements, Credits and Thanks

© 2010-2023 Steve Jones. All Rights Reserved.

DISCLAIMER: All content was generated via human effort. Every attempt is made to ensure accuracy, and any errors detected or reported are corrected. But it is not possible to guarantee 100% accuracy. Therefore the contents of this site are not suitable for any use involving risk to health, finances or property.

DO NOT ASSUME ONTIME ZONE BORDERS REFLECT POLITICAL BOUNDARIES. Some political boundaries are complex, with conflicting sources of data and possible ongoing disputes. This is especially true of many Native American lands. OTZ boundaries seek only to show the likely time at a given location, not to indicate anything about the local legal or political authority. Travelers should use other resources to remain mindful of their location when near international boundaries or those of soverign entities, especially those which may be poorly marked or follow geographic features.

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