GMT to ART
-3hGMT
GMTSOURCEART
ARTGreen rows indicate typical business hours (9 AM - 5 PM)
GMT and ART on the World Map
The map below highlights the GMT (Greenwich Mean Time) and ART (Argentina Time) timezone regions across the globe.
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
ART – Argentina Time
UTC-03:00Argentina Time (ART) is the standard time for Argentina, 3 hours behind UTC.
- •Argentina does not observe daylight saving time.
- •Buenos Aires is one of the most visited cities in South America.
- •ART is the same offset as BRT (UTC-03:00).
Comparing Time Zones: GMT and ART
GMT runs on Greenwich Mean Time (GMT) at UTC+00:00. ART runs on Argentina Time (ART) at UTC-03:00. That puts GMT 3 hours behind ART — a difference of -3h at the current offsets.
In practice, when it is 9:00 AM in GMT it is 6:00 AM in ART. Midnight in GMT is 9:00 PM in ART. Neither zone observes daylight saving time, so the offset between them stays constant all year.
GMT to ART time conversion table
| GMT (GMT) | ART (ART) | Day |
|---|---|---|
| 12:00 AM | 9:00 PM | previous day |
| 6:00 AM | 3:00 AM | same day |
| 7:00 AM | 4:00 AM | same day |
| 8:00 AM | 5:00 AM | same day |
| 9:00 AM | 6:00 AM | same day |
| 12:00 PM | 9:00 AM | same day |
| 3:00 PM | 12:00 PM | same day |
| 5:00 PM | 2:00 PM | same day |
| 6:00 PM | 3:00 PM | same day |
| 9:00 PM | 6:00 PM | same day |
Why people convert GMT to ART time
- Scheduling a call from GMT to ART: a 10:00 AM start in GMT lands at 7:00 AM in ART, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both GMT and ART are inside the 9-to-5 working day between 12:00 PM and 5:00 PM GMT time (9:00 AM–2:00 PM ART). That is roughly 5 hours of usable overlap.
- Watching a live event or market open: GMT viewers need 6:00 AM in ART to catch a 9:00 AM start there, and 3:00 AM if the event is anchored to GMT.
- Always state the zone abbreviation, not just the hour. "3:00 PM GMT" is unambiguous; "3 PM" across a -3h gap is not.
- Block 12:00 PM–5:00 PM GMT as the recurring meeting window if you work primarily from GMT and need ART colleagues present.
About GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
About ART (Argentina Time)
Argentina Time (ART) is the time zone used throughout Argentina. Argentina does not observe daylight saving time. ART shares the same offset as Brasilia Time (BRT) and Uruguay's UYT.
Best time to call between GMT and ART
Both GMT and ART sit inside the 9 AM – 5 PM working day between 12:00 PM–5:00 PM GMT, which is 9:00 AM–2:00 PM ART. That gives roughly 5 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
GMT and ART share 5 hours of working-hours overlap (12:00 PM–5:00 PM GMT), so scheduling a live meeting is straightforward.
GMT is 3 hours behind ART (GMT UTC+00:00 → ART UTC-03:00). The shared working window is 12:00 PM–5:00 PM GMT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
GMT
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
ART
Does not observe DST
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between GMT and ART?
GMT (GMT, UTC+00:00) is 3 hours behind ART (ART, UTC-03:00). The gap is currently -3h.
How do I convert GMT time to ART time?
Add -3h to GMT local time. For example, 9:00 AM in GMT is 6:00 AM in ART.
What time is it in ART right now?
ART uses ART at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -3h offset from GMT.
What is the best time to call ART from GMT?
Call between 12:00 PM and 5:00 PM GMT — that maps to 9:00 AM–2:00 PM ART and keeps both parties inside the working day.
Which is behind, GMT or ART?
GMT is 3 hours behind ART. When it is 12:00 PM in GMT it is 9:00 AM in ART.
Does daylight saving time affect the GMT–ART difference?
Neither zone observes daylight saving time, so the -3h offset between GMT and ART is fixed all year.
Which other cities share GMT's time zone?
GMT also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.
Which countries use GMT, GMT's zone?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.
Is there a day difference between GMT and ART?
Not normally. The -3h gap only pushes the date over the previous day.
What is the time difference between GMT and ART?
ART is -3h from GMT.
What timezone is GMT in?
GMT operates on its local timezone.
What timezone is ART in?
ART operates on its local timezone.
Which countries use GMT (Greenwich Mean Time)?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.
Does GMT observe daylight saving time?
Yes, GMT switches to BST during summer months.
What are some interesting facts about GMT?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
Which cities are in the ART timezone?
Major cities in the ART timezone include Buenos Aires, Córdoba, Rosario, Mendoza, La Plata, Tucumán.
What is the UTC offset for ART?
Argentina Time (ART) is at UTC-03:00.
What should I know about the ART timezone?
Argentina does not observe daylight saving time. Buenos Aires is one of the most visited cities in South America.
When is it midnight in GMT, what time is it in ART?
When it is 12:00 AM (midnight) in GMT (GMT), it is -3h later in ART (ART).
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See every conversion from GMT →·See every conversion from ART →