USA-Mexico time zone difference

Few country pairs are this easy. Because Mexico City keeps to UTC-6 and stops changing its clocks, it tracks US Central Time closely all year. That makes the US-Mexico corridor one of the cleanest nearshore overlaps anywhere: a near-full shared working day with no awkward dawn or midnight calls.

How far apart are the USA and Mexico?

Most of Mexico, including Mexico City, runs on Central Time at UTC-6. Since 2022 it no longer observes daylight saving, so it stays on UTC-6 year-round. A narrow northern border strip still follows the US schedule. The gap below therefore depends only on which US zone you are in and whether the US is on summer or winter time.

The shared working window

Because Mexico City sits at or near US Central, almost the entire business day overlaps. Here is what common US Central times look like in Mexico City, in both seasons.

In US winter the two clocks are identical, so a 9-to-5 day in Chicago is a 9-to-5 day in Mexico City. In US summer, Mexico City simply reads one hour earlier, which still leaves a wide overlap with the standard US workday.

From the coasts

From the US East Coast, Mexico City is 1 hour behind in winter and 2 hours behind in summer, so a 10:00 AM ET call is mid-morning in Mexico City either way. From the West Coast, Mexico City is 1 hour ahead in summer and 2 hours ahead in winter, so an early-afternoon Pacific meeting still lands inside the Mexican workday. There is no time of day where a normal business hour on one side falls outside business hours on the other.

Keep both cities in view

The US-Mexico overlap is generous, but the seasonal one-hour shift is exactly where recurring meetings drift. Atlas keeps your US city and Mexico City side by side in your Mac menu bar, shades the hours when both sides are working, and writes any meeting to your calendar in both local times. For a tighter corridor, compare it with the USA-Colombia time zone difference.