Current ADT time
· week 43 · day 294/365
Atlantic Daylight Time
ADT means Atlantic Daylight Time. It is fixed at UTC-3 and does not change for daylight saving time.
- Zone
- ADT
- UTC offset
- UTC-3
- DST
- No
- Next change
- None
- Countries
- 4
- Representative IANA zones
- 1
- 09:00 in UTC
- 12:00
These IANA zones keep UTC-3 under the current tzdb rules; historical offsets may differ.
Etc/GMT+3
Time difference with your location
Atlantic Daylight Time is 3 hours behind UTC. Compare with your local time →
Where this time is used
Cities in 4 countries keep UTC-3 throughout 2026. Sharing an offset does not necessarily mean using the same abbreviation.
Countries and cities in this time zone · ADT
12 representative cities below currently show UTC-3.
| Location | Local time | UTC offset |
|---|---|---|
| São PauloBrazil | UTC-3 | |
| Buenos AiresArgentina | UTC-3 | |
| AsunciónParaguay | UTC-3 | |
| MontevideoUruguay | UTC-3 | |
| Rio de JaneiroBrazil | UTC-3 | |
| Belo HorizonteBrazil | UTC-3 |
Other zones with the same UTC offset
3 other time zones share UTC-3 with ADT right now. Regional zones may leave this offset when their clocks change.
Quick conversions · ADT
ADT = UTC-3, so 09:00 ADT = 12:00 UTC (on the corresponding UTC day). These 40 zones show the equivalent of 09:00 ADT using today's offsets.
| Time zone | UTC · difference | 09:00 ADT = |
|---|---|---|
| ADT to UTCCoordinated Universal Time | UTC+0+3h | 12:00 |
| ADT to ESTEastern Standard Time | UTC-5−2h | 07:00 |
| ADT to ISTIndia Standard Time | UTC+5:30+8h30m | 17:30 |
| ADT to PSTPacific Standard Time | UTC-8−5h | 04:00 |
| ADT to GMTGreenwich Mean Time | UTC+0+3h | 12:00 |
| ADT to CSTCentral Standard Time | UTC-6−3h | 06:00 |
| ADT to MSTMountain Standard Time | UTC-7−4h | 05:00 |
| ADT to CETCentral European Time | UTC+1+4h | 13:00 |
| ADT to AESTAustralian Eastern Standard Time | UTC+10+13h | 22:00 |
| ADT to ICTIndochina Time | UTC+7+10h | 19:00 |
| ADT to JSTJapan Standard Time | UTC+9+12h | 21:00 |
| ADT to KSTKorea Standard Time | UTC+9+12h | 21:00 |
| ADT to SGTSingapore Time | UTC+8+11h | 20:00 |
| ADT to HKTHong Kong Time | UTC+8+11h | 20:00 |
| ADT to BSTBritish Summer Time | UTC+1+4h | 13:00 |
| ADT to EDTEastern Daylight Time | UTC-4−1h | 08:00 |
| ADT to PDTPacific Daylight Time | UTC-7−4h | 05:00 |
| ADT to CDTCentral Daylight Time | UTC-5−2h | 07:00 |
| ADT to ACDTAustralian Central Daylight Time | UTC+10:30+13h30m | 22:30 |
| ADT to ACSTAustralian Central Standard Time | UTC+9:30+12h30m | 21:30 |
| Time zone | UTC · difference | 09:00 ADT = |
|---|---|---|
| ADT to AEDTAustralian Eastern Daylight Time | UTC+11+14h | 23:00 |
| ADT to AFSTAfghanistan Time | UTC+4:30+7h30m | 16:30 |
| ADT to AKDTAlaska Daylight Time | UTC-8−5h | 04:00 |
| ADT to AKSTAlaska Standard Time | UTC-9−6h | 03:00 |
| ADT to ALMTAlmaty Time | UTC+5+8h | 17:00 |
| ADT to AOEAnywhere on Earth | UTC-12−9h | 00:00 |
| ADT to AST-ARABIAArabia Standard Time | UTC+3+6h | 15:00 |
| ADT to ARTArgentina Time | UTC-3same time | 09:00 |
| ADT to ASTAtlantic Standard Time | UTC-4−1h | 08:00 |
| ADT to AWSTAustralian Western Standard Time | UTC+8+11h | 20:00 |
| ADT to BDTBangladesh Time | UTC+6+9h | 18:00 |
| ADT to BRTBrasília Time | UTC-3same time | 09:00 |
| ADT to CATCentral Africa Time | UTC+2+5h | 14:00 |
| ADT to CTCentral Time | UTC-5−2h | 07:00 |
| ADT to CESTCentral European Summer Time | UTC+2+5h | 14:00 |
| ADT to CHADTChatham Daylight Time | UTC+13:45+16h45m | 01:45 |
| ADT to CHASTChatham Standard Time | UTC+12:45+15h45m | 00:45 |
| ADT to CST-CHINAChina Standard Time | UTC+8+11h | 20:00 |
| ADT to CHSTChamorro Standard Time | UTC+10+13h | 22:00 |
| ADT to CLTChile Time | UTC-4−1h | 08:00 |
Frequently asked questions
What is ADT?
ADT means Atlantic Daylight Time. It is fixed at UTC-3 and does not change for daylight saving time.
Where is ADT's UTC offset used?
UTC-3 is used all year in Brazil, Argentina, Paraguay, and Uruguay. 4 countries in our data have cities at this offset; local abbreviations can differ.
ADT vs UTC: what is the difference?
ADT = UTC-3, so 09:00 ADT = 12:00 UTC (on the corresponding UTC day).
Does ADT have daylight saving time?
No. ADT always means UTC-3. A region may switch to a different abbreviation, but this fixed label does not change its offset.