Africa/Bissau is an IANA time zone used in Guinea-Bissau. It stays on UTC+0 all year.
Africa/Bissau at a glance
| UTC offset now | UTC+0 |
|---|---|
| Standard time | UTC+0 (GMT) |
| Abbreviations | GMT |
| Used in | Guinea-Bissau |
Rules of the Africa/Bissau time zone
Africa/Bissau stays on UTC+0 all year. The tz database records no daylight saving time in this zone since 1970.
Recent and upcoming changes in Africa/Bissau
| Date | Change | New offset |
|---|---|---|
| Wednesday, January 1, 1975 | Clocks go forward 1 hour and stay there: 12:00 AM becomes 1:00 AM | UTC+0 |
The base offset of this zone changed in 1975, from UTC−1 to UTC+0. Old timestamps should be converted with the rule that applied at the time.
Where Africa/Bissau is used
Africa/Bissau is used in Guinea-Bissau. These are the largest cities in our list that follow it.
Africa/Bissau 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) | --:-- | 5 h behind | 5 h behind | 4 h behind |
| Los Angeles (United States) | --:-- | 8 h behind | 8 h behind | 7 h behind |
| London (United Kingdom) | --:-- | Same time | Same time | 1 h ahead |
| Paris (France) | --:-- | 1 h ahead | 1 h ahead | 2 h ahead |
| Dubai (United Arab Emirates) | --:-- | 4 h ahead | 4 h ahead | 4 h ahead |
| Mumbai (India) | --:-- | 5 h 30 min ahead | 5 h 30 min ahead | 5 h 30 min ahead |
| Singapore | --:-- | 8 h ahead | 8 h ahead | 8 h ahead |
| Tokyo (Japan) | --:-- | 9 h ahead | 9 h ahead | 9 h ahead |
| Sydney (Australia) | --:-- | 11 h ahead | 11 h ahead | 10 h ahead |
| UTC | --:-- | Same time | Same time | Same time |
Other zones on UTC+0 right now
These IANA zones show the same time as Africa/Bissau today. Their clock-change rules may differ.
- Africa/Abidjan
- Africa/Accra
- Africa/Bamako
- Africa/Banjul
- Africa/Casablanca
- Africa/Conakry
- Africa/Dakar
- Africa/El_Aaiun
- Africa/Freetown
- Africa/Lome
- Africa/Monrovia
- Africa/Nouakchott
Using Africa/Bissau in software
Use the zone name Africa/Bissau rather than an abbreviation or a fixed offset. Abbreviations can mean several zones, and offsets ignore future clock changes.
Show the current time in Africa/Bissau:
// JavaScript
new Intl.DateTimeFormat('en-GB', { timeZone: 'Africa/Bissau', timeStyle: 'long' }).format(new Date());
# Python
from datetime import datetime
from zoneinfo import ZoneInfo
datetime.now(ZoneInfo('Africa/Bissau'))
// PHP
(new DateTime('now', new DateTimeZone('Africa/Bissau')))->format('c');
# Shell
TZ=Africa/Bissau datePlan around the time in Africa/Bissau
- Convert a time to or from Africa/Bissau: pick a date and time and see it in every city on your list.
- Add Bissau to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Africa/Bissau 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 Africa/Bissau?
UTC+0, all year.
What abbreviation does Africa/Bissau use?
GMT. Abbreviations are not unique, so use the zone name Africa/Bissau in software.
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.