Time ZonesAbout this time zone
Monterrey is one of the 12 time zone areas of Mexico. Computers and phones know it by the zone name America/Monterrey. Its time is UTC−6, which means it is 6 hours behind Coordinated Universal Time (UTC) all year round. The short name used for this time is CST. Compared with India (IST), it is 11 hours 30 minutes behind India.
Clock changes in 2026 and 2027
Monterrey does not change its clocks in 2026 or 2027. The time stays at UTC−6 all year, so there is no daylight saving time to remember.
Time difference with major cities
| When it is 12:00 noon in Monterrey, it is | In January 2026 | In July 2026 |
|---|---|---|
| India | 11:30 pm11 hours 30 minutes ahead | 11:30 pm11 hours 30 minutes ahead |
| United Kingdom | 6:00 pm6 hours ahead | 7:00 pm7 hours ahead |
| France | 7:00 pm7 hours ahead | 8:00 pm8 hours ahead |
| New York, United States | 1:00 pm1 hour ahead | 2:00 pm2 hours ahead |
| Chicago, United States | 12:00 pmsame time | 1:00 pm1 hour ahead |
| Los Angeles, United States | 10:00 am2 hours behind | 11:00 am1 hour behind |
| United Arab Emirates | 10:00 pm10 hours ahead | 10:00 pm10 hours ahead |
| Singapore | 2:00 am next day14 hours ahead | 2:00 am next day14 hours ahead |
| Japan | 3:00 am next day15 hours ahead | 3:00 am next day15 hours ahead |
| Sydney, Australia | 5:00 am next day17 hours ahead | 4:00 am next day16 hours ahead |
The table uses the offsets in force in mid January and mid July 2026. Use the converter for any other date.
Clock time and sun time in Monterrey
A time zone is an agreement, and the sun does not follow it exactly. Monterrey, the largest city in this zone, lies at about 100.3° west. Each degree of longitude is worth four minutes, so by the sun alone its time would be about 6 hours 41 minutes behind UTC. The clock is set to UTC−6. The sun is therefore highest in the sky at about 12:41 pm by the clock, not at 12:00. The clock runs ahead of the sun here, which means later sunrises and lighter evenings than the map alone would give. Other places in the zone, to the east or west of Monterrey, see the sun peak a little earlier or later. Through the year the figure also drifts by up to a quarter of an hour either way.
How long the day is
Monterrey is about 25.7° north of the equator. On the longest day of the year, around 21 June, the sun is up for about 13 hours 45 minutes. On the shortest, around 21 December, for about 10 hours 32 minutes. The difference between summer and winter is about 3 hours 13 minutes, and the clocks stay the same all year.
Office hours shared with other places
If both sides work from 9 am to 6 pm, these are the hours when a call falls inside the working day at both ends. Times are for Monterrey.
- With India, all year: no shared office hour: 9:00 am here is 8:30 pm in India, and 6:00 pm here is 5:30 am there, so one side has to start early or stay late.
- With London, in January: 9:00 am to 12:00 pm here, which is 3:00 pm to 6:00 pm in London (3 hours shared). In July: 9:00 am to 11:00 am here, which is 4:00 pm to 6:00 pm in London (2 hours shared).
- With New York, in January: 9:00 am to 5:00 pm here, which is 10:00 am to 6:00 pm in New York (8 hours shared). In July: 9:00 am to 4:00 pm here, which is 11:00 am to 6:00 pm in New York (7 hours shared).
How many people keep this time
The GeoNames list has 59 towns and cities of 15,000 people or more in this zone area, with about 9.7 million people between them. People in villages and smaller towns are not in that count, so the true number on this clock is higher.
Cities that keep this time
The largest cities in this zone: Monterrey, Torreón, San Luis Potosí, Saltillo, Guadalupe, Victoria de Durango, Ciudad Apodaca, Ciudad General Escobedo, San Nicolás de los Garza, Ciudad Victoria, Tampico, Ciudad Benito Juárez, Santa Catarina, Gómez Palacio.
Places with exactly the same time
These zones show the same time as Monterrey through the whole year: Bahia Banderas, Mexico, Belize, Chihuahua, Mexico, Costa Rica, El Salvador, Guatemala, Managua, Nicaragua, Merida, Mexico, Mexico City, Mexico, Regina, Canada, Swift Current, Canada, Tegucigalpa, Honduras.
The clock above uses your device's clock and the time zone rules built into your browser. Rules on this page: IANA time zone database 2026f. See About and data sources.