Teresina runs on UTC−3 every day of the year, with no daylight saving time.
Teresina and your time
Teresina at a glance
| Country | Brazil |
|---|---|
| Region | Piauí |
| Time zone | America/Fortaleza |
| UTC offset now | UTC−3 |
| Daylight saving time | Not observed since 2002 |
| Coordinates | 5.09° S, 42.80° W |
Which time zone Teresina uses
Teresina follows the America/Fortaleza time zone and stays on UTC−3 all year. Clocks here last changed for daylight saving time in 2002; the tz database lists no change after that.
Although Brazil has 4 different offsets, Teresina keeps the same time as Brasília.
Clock changes in Teresina, 2026 and 2027
No clock changes are scheduled in Teresina for 2026 or 2027.
How far ahead or behind Teresina is
A 9:00 AM start in Teresina is 12:00 PM in London, 11:00 PM in Sydney and 4:00 AM in Los Angeles.
| City | Time now | Difference now | In January | In July | Shared office hours |
|---|---|---|---|---|---|
| Brasília | --:-- | Same time | Same time | Same time | 8 h |
| New York (United States) | --:-- | 2 h behind | 2 h behind | 1 h behind | 6 h |
| Los Angeles (United States) | --:-- | 5 h behind | 5 h behind | 4 h behind | 3 h |
| London (United Kingdom) | --:-- | 3 h ahead | 3 h ahead | 4 h ahead | 5 h |
| Paris (France) | --:-- | 4 h ahead | 4 h ahead | 5 h ahead | 4 h |
| Dubai (United Arab Emirates) | --:-- | 7 h ahead | 7 h ahead | 7 h ahead | 1 h |
| Mumbai (India) | --:-- | 8 h 30 min ahead | 8 h 30 min ahead | 8 h 30 min ahead | None |
| Singapore | --:-- | 11 h ahead | 11 h ahead | 11 h ahead | None |
| Tokyo (Japan) | --:-- | 12 h ahead | 12 h ahead | 12 h ahead | None |
| Sydney (Australia) | --:-- | 14 h ahead | 14 h ahead | 13 h ahead | None |
| UTC | --:-- | 3 h ahead | 3 h ahead | 3 h ahead | 5 h |
Teresina never changes its clocks, but many of these cities do. Where the January and July columns disagree, the gap shifts when the other city moves to or from daylight saving time.
Shared office hours is the part of a 9 AM to 5 PM local working day that both cities have in common. Weekends are not taken into account.
Sunrise, sunset and day length in Teresina
Today
| Sunrise | --:-- |
|---|---|
| Sunset | --:-- |
| Day length | -- |
| Solar noon | --:-- |
Close to the equator, days in Teresina last between 11 hours 50 minutes and 12 hours 25 minutes, so evenings get dark at about the same time all year.
Daylight through the year in Teresina
| Date | Sunrise | Sunset | Day length | |
|---|---|---|---|---|
| March equinox | March 20 | 5:55 AM | 6:02 PM | 12 h 7 min |
| June solstice | June 21 | 5:58 AM | 5:48 PM | 11 h 50 min |
| September equinox | September 22 | 5:41 AM | 5:47 PM | 12 h 6 min |
| December solstice | December 21 | 5:37 AM | 6:02 PM | 12 h 25 min |
When the sun is highest in Teresina
Clock time and sun time line up fairly well in Teresina: solar noon falls at about 11:50 AM on standard time.
Cities near Teresina
Every city below shares Teresina’s clock.
| City | Distance | Time now | Difference |
|---|---|---|---|
| Caxias | 67 km (41 mi) | --:-- | Same time |
| Codó | 139 km (87 mi) | --:-- | Same time |
| Bacabal | 239 km (149 mi) | --:-- | Same time |
| Parnaíba | 268 km (167 mi) | --:-- | Same time |
Other cities on America/Fortaleza time
These cities use America/Fortaleza, the same time zone as Teresina.
Same time now, different rules
These places read the same time as Teresina today but follow different rules, so they can drift apart when clocks change.
More cities in Brazil
- São Paulo
- Rio de Janeiro
- Belo Horizonte
- Salvador
- Fortaleza
- Manaus
- Brasília
- Curitiba
- Recife
- Goiânia
- Belém
- Porto Alegre
All time zones and cities in Brazil
Plan around the time in Teresina
- Convert a time to or from Teresina: pick a date and time and see it in every city on your list.
- Add Teresina to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Teresina and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
What time zone is Teresina in?
Teresina uses the America/Fortaleza time zone, which is UTC−3 all year.
Does Teresina use daylight saving time?
Not any more. Teresina last changed its clocks for daylight saving time in 2002 and now stays on UTC−3 all year.
What is the time difference between Teresina and London?
Teresina is 3 hours behind London in January and 4 hours behind London in July, because London moves its clocks for daylight saving time and Teresina does not.
Is Teresina on the same time as Brasília?
Yes. Teresina and Brasília both use UTC−3 right now.
How long is the longest day in Teresina?
About 12 hours 25 minutes, around the December solstice. The shortest day, around the June solstice, has about 11 hours 50 minutes of daylight.
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.