America/Boa_Vista is an IANA time zone used in Brazil. It stays on UTC−4 all year.
America/Boa_Vista at a glance
| UTC offset now | UTC−4 |
|---|---|
| Standard time | UTC−4 |
| Used in | Brazil |
Rules of the America/Boa_Vista time zone
No clock changes are scheduled in America/Boa_Vista. The last one for daylight saving time was in 2000; since then the offset has been UTC−4 all year.
Recent and upcoming changes in America/Boa_Vista
| Date | Change | New offset |
|---|---|---|
| Sunday, October 3, 1999 | Clocks go forward 1 hour: 12:00 AM becomes 1:00 AM | UTC−3 |
| Saturday, February 26, 2000 | Clocks go back 1 hour: 12:00 AM becomes 11:00 PM | UTC−4 |
| Sunday, October 8, 2000 | Clocks go forward 1 hour: 12:00 AM becomes 1:00 AM | UTC−3 |
| Saturday, October 14, 2000 | Clocks go back 1 hour for good: 12:00 AM becomes 11:00 PM | UTC−4 |
Where America/Boa_Vista is used
America/Boa_Vista is used in Brazil. These are the largest cities in our list that follow it.
America/Boa_Vista compared with other time zones
Differences change during the year when one side moves to or from daylight saving time, so the table shows January and July separately.
| City | Time now | Difference now | In January | In July |
|---|---|---|---|---|
| New York (United States) | --:-- | 1 h behind | 1 h behind | Same time |
| Los Angeles (United States) | --:-- | 4 h behind | 4 h behind | 3 h behind |
| London (United Kingdom) | --:-- | 4 h ahead | 4 h ahead | 5 h ahead |
| Paris (France) | --:-- | 5 h ahead | 5 h ahead | 6 h ahead |
| Dubai (United Arab Emirates) | --:-- | 8 h ahead | 8 h ahead | 8 h ahead |
| Mumbai (India) | --:-- | 9 h 30 min ahead | 9 h 30 min ahead | 9 h 30 min ahead |
| Singapore | --:-- | 12 h ahead | 12 h ahead | 12 h ahead |
| Tokyo (Japan) | --:-- | 13 h ahead | 13 h ahead | 13 h ahead |
| Sydney (Australia) | --:-- | 15 h ahead | 15 h ahead | 14 h ahead |
| UTC | --:-- | 4 h ahead | 4 h ahead | 4 h ahead |
Other zones on UTC−4 right now
These IANA zones show the same time as America/Boa_Vista today. Their clock-change rules may differ.
- America/Anguilla
- America/Antigua
- America/Aruba
- America/Barbados
- America/Campo_Grande
- America/Caracas
- America/Cuiaba
- America/Curacao
- America/Dominica
- America/Glace_Bay
- America/Grenada
- America/Guadeloupe
Using America/Boa_Vista in software
Use the zone name America/Boa_Vista rather than an abbreviation or a fixed offset. Abbreviations can mean several zones, and offsets ignore future clock changes.
Show the current time in America/Boa_Vista:
// JavaScript
new Intl.DateTimeFormat('en-GB', { timeZone: 'America/Boa_Vista', timeStyle: 'long' }).format(new Date());
# Python
from datetime import datetime
from zoneinfo import ZoneInfo
datetime.now(ZoneInfo('America/Boa_Vista'))
// PHP
(new DateTime('now', new DateTimeZone('America/Boa_Vista')))->format('c');
# Shell
TZ=America/Boa_Vista datePlan around the time in America/Boa_Vista
- Convert a time to or from America/Boa_Vista: pick a date and time and see it in every city on your list.
- Add Boa Vista to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in America/Boa_Vista and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
What is the UTC offset of America/Boa_Vista?
UTC−4, all year.
Time zone rules: IANA tz database, version 2026e. Place names and coordinates: GeoNames. Sunrise and sunset are calculated from the coordinates and can differ by a minute or two from local almanacs.