America/Porto_Velho is an IANA time zone used in Brazil. It stays on UTC−4 all year.
America/Porto_Velho at a glance
| UTC offset now | UTC−4 |
|---|---|
| Standard time | UTC−4 |
| Used in | Brazil |
How America/Porto_Velho keeps time
America/Porto_Velho has stayed on UTC−4 since its last daylight saving period in 1988. Software that still applies an old rule will show the wrong time, so keep tz data up to date.
Recent and upcoming changes in America/Porto_Velho
| Date | Change | New offset |
|---|---|---|
| Saturday, October 25, 1986 | Clocks go forward 1 hour: 12:00 AM becomes 1:00 AM | UTC−3 |
| Friday, February 13, 1987 | Clocks go back 1 hour: 12:00 AM becomes 11:00 PM | UTC−4 |
| Sunday, October 25, 1987 | Clocks go forward 1 hour: 12:00 AM becomes 1:00 AM | UTC−3 |
| Saturday, February 6, 1988 | Clocks go back 1 hour for good: 12:00 AM becomes 11:00 PM | UTC−4 |
Countries and cities on America/Porto_Velho
America/Porto_Velho is used in Brazil. These are the largest cities in our list that follow it.
America/Porto_Velho 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/Porto_Velho today. Their clock-change rules may differ.
- America/Anguilla
- America/Antigua
- America/Aruba
- America/Barbados
- America/Boa_Vista
- America/Campo_Grande
- America/Caracas
- America/Cuiaba
- America/Curacao
- America/Dominica
- America/Glace_Bay
- America/Grenada
Using America/Porto_Velho in software
Use the zone name America/Porto_Velho 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/Porto_Velho:
// JavaScript
new Intl.DateTimeFormat('en-GB', { timeZone: 'America/Porto_Velho', timeStyle: 'long' }).format(new Date());
# Python
from datetime import datetime
from zoneinfo import ZoneInfo
datetime.now(ZoneInfo('America/Porto_Velho'))
// PHP
(new DateTime('now', new DateTimeZone('America/Porto_Velho')))->format('c');
# Shell
TZ=America/Porto_Velho datePlan around the time in America/Porto_Velho
- Convert a time to or from America/Porto_Velho: pick a date and time and see it in every city on your list.
- Add Porto Velho to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in America/Porto_Velho 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/Porto_Velho?
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.