At OnTimeZone.com o ur goal is to provide images and data what reflect what a traveler is actually likely to encounter in North America.

We provide time zone data for the US and the rest of North America, including the United States, Canada, Mexico, Belize, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica and Panama.

The data is provided as images and data files suitable for use in most GPS software or mapping software as well as Google Earth and Google Maps. 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 as we move forward. 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 mid 2013 are included.

Then there's Daylight Saving Time.

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

Just like "observed" time zones, someDST observation exceptions are officially sanctioned, some are merely local practice. So be warned.

Hopefully this all helps get you to dinner on time.