Time ZonesAbout this time zone
Hermosillo is one of the 12 time zone areas of Mexico. Computers and phones know it by the zone name America/Hermosillo. Its time is UTC−7, which means it is 7 hours behind Coordinated Universal Time (UTC) all year round. The short name used for this time is MST. Compared with India (IST), it is 12 hours 30 minutes behind India.
Clock changes in 2026 and 2027
Hermosillo does not change its clocks in 2026 or 2027. The time stays at UTC−7 all year, so there is no daylight saving time to remember.
Time difference with major cities
| When it is 12:00 noon in Hermosillo, it is | In January 2026 | In July 2026 |
|---|---|---|
| India | 12:30 am next day12 hours 30 minutes ahead | 12:30 am next day12 hours 30 minutes ahead |
| United Kingdom | 7:00 pm7 hours ahead | 8:00 pm8 hours ahead |
| France | 8:00 pm8 hours ahead | 9:00 pm9 hours ahead |
| New York, United States | 2:00 pm2 hours ahead | 3:00 pm3 hours ahead |
| Chicago, United States | 1:00 pm1 hour ahead | 2:00 pm2 hours ahead |
| Los Angeles, United States | 11:00 am1 hour behind | 12:00 pmsame time |
| United Arab Emirates | 11:00 pm11 hours ahead | 11:00 pm11 hours ahead |
| Singapore | 3:00 am next day15 hours ahead | 3:00 am next day15 hours ahead |
| Japan | 4:00 am next day16 hours ahead | 4:00 am next day16 hours ahead |
| Sydney, Australia | 6:00 am next day18 hours ahead | 5:00 am next day17 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 Hermosillo
A time zone is an agreement, and the sun does not follow it exactly. Hermosillo, the largest city in this zone, lies at about 111° west. Each degree of longitude is worth four minutes, so by the sun alone its time would be about 7 hours 24 minutes behind UTC. The clock is set to UTC−7. The sun is therefore highest in the sky at about 12:24 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 Hermosillo, 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
Hermosillo is about 29.1° north of the equator. On the longest day of the year, around 21 June, the sun is up for about 14 hours. On the shortest, around 21 December, for about 10 hours 17 minutes. The difference between summer and winter is about 3 hours 43 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 Hermosillo.
- With India, all year: no shared office hour: 9:00 am here is 9:30 pm in India, and 6:00 pm here is 6:30 am there, so one side has to start early or stay late.
- With London, in January: 9:00 am to 11:00 am here, which is 4:00 pm to 6:00 pm in London (2 hours shared). In July: 9:00 am to 10:00 am here, which is 5:00 pm to 6:00 pm in London (1 hour shared).
- With New York, in January: 9:00 am to 4:00 pm here, which is 11:00 am to 6:00 pm in New York (7 hours shared). In July: 9:00 am to 3:00 pm here, which is 12:00 pm to 6:00 pm in New York (6 hours shared).
How many people keep this time
The GeoNames list has 15 towns and cities of 15,000 people or more in this zone area, with about 2.2 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: Hermosillo, Ciudad Obregón, Nogales, San Luis Río Colorado, Heroica Guaymas, Navojoa, Agua Prieta, Puerto Peñasco, Heroica Caborca, Empalme, Esperanza, Cananea, Miguel Alemán (La Doce), Huatabampo.
Places with exactly the same time
These zones show the same time as Hermosillo through the whole year: Dawson Creek, Canada, Mazatlan, Mexico, Phoenix, United States, Whitehorse, Canada.
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.