Time ZonesAbout this time zone
Boa Vista is one of the 16 time zone areas of Brazil. Computers and phones know it by the zone name America/Boa_Vista. Its time is UTC−4, which means it is 4 hours behind Coordinated Universal Time (UTC) all year round. Compared with India (IST), it is 9 hours 30 minutes behind India.
Clock changes in 2026 and 2027
Boa Vista does not change its clocks in 2026 or 2027. The time stays at UTC−4 all year, so there is no daylight saving time to remember.
Time difference with major cities
| When it is 12:00 noon in Boa Vista, it is | In January 2026 | In July 2026 |
|---|---|---|
| India | 9:30 pm9 hours 30 minutes ahead | 9:30 pm9 hours 30 minutes ahead |
| United Kingdom | 4:00 pm4 hours ahead | 5:00 pm5 hours ahead |
| France | 5:00 pm5 hours ahead | 6:00 pm6 hours ahead |
| New York, United States | 11:00 am1 hour behind | 12:00 pmsame time |
| Chicago, United States | 10:00 am2 hours behind | 11:00 am1 hour behind |
| Los Angeles, United States | 8:00 am4 hours behind | 9:00 am3 hours behind |
| United Arab Emirates | 8:00 pm8 hours ahead | 8:00 pm8 hours ahead |
| Singapore | 12:00 am next day12 hours ahead | 12:00 am next day12 hours ahead |
| Japan | 1:00 am next day13 hours ahead | 1:00 am next day13 hours ahead |
| Sydney, Australia | 3:00 am next day15 hours ahead | 2:00 am next day14 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 Boa Vista
A time zone is an agreement, and the sun does not follow it exactly. Boa Vista, the largest city in this zone, lies at about 60.7° west. Each degree of longitude is worth four minutes, so by the sun alone its time would be about 4 hours 3 minutes behind UTC. The clock is set to UTC−4. The sun is therefore highest in the sky at about 12:03 pm by the clock, not at 12:00. That is a close match: clock and sun agree to within a quarter of an hour. Other places in the zone, to the east or west of Boa Vista, 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
Boa Vista is about 2.8° north of the equator. On the longest day of the year, around 21 June, the sun is up for about 12 hours 17 minutes. On the shortest, around 21 December, for about 11 hours 57 minutes. So close to the equator the day is almost the same length all year. Moving the clocks would gain nothing, and Boa Vista does not do it.
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 Boa Vista.
- With India, all year: no shared office hour: 9:00 am here is 6:30 pm in India, and 6:00 pm here is 3:30 am there, so one side has to start early or stay late.
- With London, in January: 9:00 am to 2:00 pm here, which is 1:00 pm to 6:00 pm in London (5 hours shared). In July: 9:00 am to 1:00 pm here, which is 2:00 pm to 6:00 pm in London (4 hours shared).
- With New York, in January: 10:00 am to 6:00 pm here, which is 9:00 am to 5:00 pm in New York (8 hours shared). In July: 9:00 am to 6:00 pm here, which is 9:00 am to 6:00 pm in New York (9 hours shared).
How many people keep this time
The GeoNames list has 7 towns and cities of 15,000 people or more in this zone area, with about 550,000 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: Boa Vista, Rorainópolis, Alto Alegre, Caracaraí, Pacaraima, Cantá, Mucajaí.
Places with exactly the same time
These zones show the same time as Boa Vista through the whole year: Anguilla, Antigua, Antigua and Barbuda, Aruba, Barbados, Campo Grande, Brazil, Caracas, Venezuela, Cuiaba, Brazil, Curacao, Dominica, Grenada, Guadeloupe, Guyana, Kralendijk, Bonaire, Saint Eustatius and Saba , La Paz, Bolivia.
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.