GST to Halifax
-7hGST
GSTSOURCEHalifax
ADTGreen rows indicate typical business hours (9 AM - 5 PM)
GST and ADT on the World Map
The map below highlights the GST (Gulf Standard Time) and ADT (Atlantic Standard Time) timezone regions across the globe.
GST – Gulf Standard Time
UTC+04:00Gulf Standard Time (GST) is used in the UAE, Oman, and other Gulf states, 4 hours ahead of UTC.
- •Dubai uses GST year-round with no daylight saving time.
- •GST is 9 hours ahead of EST and 4 hours ahead of GMT.
- •The Dubai Financial Market (DFM) operates on GST.
AST – Atlantic Standard Time
UTC-04:00Atlantic Standard Time (AST) is the time zone for the Canadian Atlantic provinces and the Caribbean, 4 hours behind UTC.
- •Puerto Rico uses AST year-round and does not observe DST.
- •AST is 1 hour ahead of EST.
- •Halifax, the capital of Nova Scotia, is the largest city in AST Canada.
About Halifax
WikipediaHalifax operates on Atlantic Time (AST/ADT), UTC-4. As Canada's major Atlantic port and closest city to Europe, Halifax bridges North American and European business.
Halifax harbors the second largest natural ice-free harbor in the world.
Comparing Time Zones: GST and Halifax
GST runs on Gulf Standard Time (GST) at UTC+04:00. Halifax runs on Atlantic Daylight Time (ADT) at UTC-03:00, also currently on daylight saving time. That puts GST 7 hours behind Halifax — a difference of -7h at the current offsets.
In practice, when it is 9:00 AM in GST it is 2:00 AM in Halifax. Midnight in GST is 5:00 PM in Halifax.Halifax observes daylight saving time while GST does not, so the gap narrows or widens by an hour part of the year.
GST to Halifax time conversion table
| GST (GST) | Halifax (ADT) | Day |
|---|---|---|
| 12:00 AM | 5:00 PM | previous day |
| 6:00 AM | 11:00 PM | previous day |
| 7:00 AM | 12:00 AM | same day |
| 8:00 AM | 1:00 AM | same day |
| 9:00 AM | 2:00 AM | same day |
| 12:00 PM | 5:00 AM | same day |
| 3:00 PM | 8:00 AM | same day |
| 5:00 PM | 10:00 AM | same day |
| 6:00 PM | 11:00 AM | same day |
| 9:00 PM | 2:00 PM | same day |
Why people convert GST to Halifax time
- Scheduling a call from GST to Halifax: a 10:00 AM start in GST lands at 3:00 AM in Halifax, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both GST and Halifax are inside the 9-to-5 working day between 4:00 PM and 5:00 PM GST time (9:00 AM–10:00 AM ADT). That is roughly 1 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in GST is 1:00 PM in Halifax makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM GST" is unambiguous; "3 PM" across a -7h gap is not.
- Block 4:00 PM–5:00 PM GST as the recurring meeting window if you work primarily from GST and need Halifax colleagues present.
- Halifax: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
About GST (Gulf Standard Time)
Gulf Standard Time (GST) is the time zone used in the United Arab Emirates, Oman, and other Gulf states. GST does not observe daylight saving time. Dubai and Abu Dhabi, major international business and tourism hubs, operate on GST.
About AST (Atlantic Standard Time)
Atlantic Standard Time (AST) covers Canada's Atlantic provinces (Nova Scotia, New Brunswick, Prince Edward Island, and most of Labrador), as well as several Caribbean nations. Puerto Rico and the US Virgin Islands use AST year-round without daylight saving time. The Canadian provinces switch to Atlantic Daylight Time (ADT) in summer.
Best time to call between GST and Halifax
Both GST and Halifax sit inside the 9 AM – 5 PM working day between 4:00 PM–5:00 PM GST, which is 9:00 AM–10:00 AM ADT. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
GST and Halifax overlap for only 60 minutes (4:00 PM–5:00 PM GST), so meetings have to be booked precisely.
GST is 7 hours behind Halifax (GST UTC+04:00 → ADT UTC-03:00). The shared working window is 4:00 PM–5:00 PM GST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
GST
Does not observe DST
Halifax
☀ Currently in DST
Standard: UTC-04:00 · DST: UTC-03:00
Clocks fall back on Sun, Nov 1, 2026
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 GST and Halifax?
GST (GST, UTC+04:00) is 7 hours behind Halifax (ADT, UTC-03:00). The gap is currently -7h.
How do I convert GST time to Halifax time?
Add -7h to GST local time. For example, 9:00 AM in GST is 2:00 AM in Halifax.
What time is it in Halifax right now?
Halifax uses ADT at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -7h offset from GST.
What is the best time to call Halifax from GST?
Call between 4:00 PM and 5:00 PM GST — that maps to 9:00 AM–10:00 AM ADT and keeps both parties inside the working day.
Which is behind, GST or Halifax?
GST is 7 hours behind Halifax. When it is 12:00 PM in GST it is 5:00 AM in Halifax.
Do GST and Halifax use different time zones?
GST uses GST at UTC+04:00, while Halifax (Canada) uses ADT at UTC-03:00. The IANA identifiers are Asia/Dubai and America/Halifax.
Does daylight saving time affect the GST–Halifax difference?
Yes at the moment: Halifax is on daylight saving time and GST is not, so the -7h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share GST's time zone?
GST also covers Dubai, Abu Dhabi, Muscat, Baku, Tbilisi.
Which countries use GST, GST's zone?
GST is used in UAE, Oman, Georgia, Azerbaijan, Mauritius.
Is there a day difference between GST and Halifax?
Not normally. The -7h gap only pushes the date over the previous day.
What is the time difference between GST and Halifax?
Halifax is -7h from GST.
What timezone is GST in?
GST operates on its local timezone.
What timezone is Halifax in?
Halifax operates on Atlantic Time (AST/ADT), UTC-4. As Canada's major Atlantic port and closest city to Europe, Halifax bridges North American and European business.
What are the business hours in Halifax?
Standard business hours in Halifax are 9:00 AM - 5:00 PM AST.
Which countries use GST (Gulf Standard Time)?
GST is used in UAE, Oman, Georgia, Azerbaijan, Mauritius.
Does GST observe daylight saving time?
No, GST does not observe daylight saving time and remains at UTC+04:00 year-round.
What are some interesting facts about GST?
Dubai uses GST year-round with no daylight saving time. GST is 9 hours ahead of EST and 4 hours ahead of GMT.
Which cities are in the AST timezone?
Major cities in the AST timezone include Halifax, San Juan, Santo Domingo, Caracas, La Paz, Fredericton, Charlottetown.
What is the UTC offset for AST?
Atlantic Standard Time (AST) is at UTC-04:00. During daylight saving time, it shifts to ADT.
What should I know about the AST timezone?
Puerto Rico uses AST year-round and does not observe DST. AST is 1 hour ahead of EST.
When is it midnight in GST, what time is it in Halifax?
When it is 12:00 AM (midnight) in GST (GST), it is -7h later in Halifax (AST).
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