AST to SAST
+6hAST
ASTSOURCESAST
SASTGreen rows indicate typical business hours (9 AM - 5 PM)
AST and SAST on the World Map
The map below highlights the AST (Atlantic Standard Time) and SAST (South Africa Standard Time) timezone regions across the globe.
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.
SAST – South Africa Standard Time
UTC+02:00South Africa Standard Time (SAST) is the time zone for South Africa and neighboring countries, 2 hours ahead of UTC.
- •South Africa does not observe daylight saving time.
- •SAST is the same offset as EET and Israel Standard Time.
- •The Johannesburg Stock Exchange (JSE) is Africa's largest.
AST to SAST Time Difference – Complete Guide
AST runs on Atlantic Standard Time (AST) at UTC-04:00. SAST runs on South Africa Standard Time (SAST) at UTC+02:00. That puts AST 6 hours ahead of SAST — a difference of +6h at the current offsets.
In practice, when it is 9:00 AM in AST it is 3:00 PM in SAST. Midnight in AST is 6:00 AM in SAST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
AST to SAST time conversion table
| AST (AST) | SAST (SAST) | Day |
|---|---|---|
| 12:00 AM | 6:00 AM | same day |
| 6:00 AM | 12:00 PM | same day |
| 7:00 AM | 1:00 PM | same day |
| 8:00 AM | 2:00 PM | same day |
| 9:00 AM | 3:00 PM | same day |
| 12:00 PM | 6:00 PM | same day |
| 3:00 PM | 9:00 PM | same day |
| 5:00 PM | 11:00 PM | same day |
| 6:00 PM | 12:00 AM | next day |
| 9:00 PM | 3:00 AM | next day |
Why people convert AST to SAST time
- Scheduling a call from AST to SAST: a 10:00 AM start in AST lands at 4:00 PM in SAST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both AST and SAST are inside the 9-to-5 working day between 9:00 AM and 11:00 AM AST time (3:00 PM–5:00 PM SAST). That is roughly 2 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in AST is 2:00 AM in SAST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM AST" is unambiguous; "3 PM" across a +6h gap is not.
- Block 9:00 AM–11:00 AM AST as the recurring meeting window if you work primarily from AST and need SAST colleagues present.
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.
About SAST (South Africa Standard Time)
South Africa Standard Time (SAST) is used in South Africa, Lesotho, and Eswatini. SAST does not observe daylight saving time. Johannesburg and Cape Town are major economic hubs in Africa.
Best time to call between AST and SAST
Both AST and SAST sit inside the 9 AM – 5 PM working day between 9:00 AM–11:00 AM AST, which is 3:00 PM–5:00 PM SAST. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
AST and SAST overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
AST is 6 hours ahead of SAST (AST UTC-04:00 → SAST UTC+02:00). The shared working window is 9:00 AM–11:00 AM AST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
AST
☀ Currently in DST
Standard: UTC-04:00 · DST: UTC-03:00
Clocks fall back on Sun, Nov 1, 2026
SAST
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 AST and SAST?
AST (AST, UTC-04:00) is 6 hours ahead of SAST (SAST, UTC+02:00). The gap is currently +6h.
How do I convert AST time to SAST time?
Add +6h to AST local time. For example, 9:00 AM in AST is 3:00 PM in SAST.
What time is it in SAST right now?
SAST uses SAST at UTC+02:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +6h offset from AST.
What is the best time to call SAST from AST?
Call between 9:00 AM and 11:00 AM AST — that maps to 3:00 PM–5:00 PM SAST and keeps both parties inside the working day.
Which is ahead, AST or SAST?
AST is 6 hours ahead of SAST. When it is 12:00 PM in AST it is 6:00 PM in SAST.
Does daylight saving time affect the AST–SAST difference?
Neither zone observes daylight saving time, so the +6h offset between AST and SAST is fixed all year.
Which other cities share AST's time zone?
AST also covers Halifax, San Juan, Santo Domingo, Caracas, La Paz, Fredericton, Charlottetown.
Which countries use AST, AST's zone?
AST is used in Canada (Atlantic provinces), Puerto Rico, US Virgin Islands, Dominican Republic, Venezuela, Bolivia, Barbados, Trinidad and Tobago.
Is there a day difference between AST and SAST?
Not normally. The +6h gap only pushes the date over for late-evening times.
What is the time difference between AST and SAST?
SAST is +6h from AST.
What timezone is AST in?
AST operates on its local timezone.
What timezone is SAST in?
SAST operates on its local timezone.
Which countries use AST (Atlantic Standard Time)?
AST is used in Canada (Atlantic provinces), Puerto Rico, US Virgin Islands, Dominican Republic, Venezuela, Bolivia, and 2 more countries.
Does AST observe daylight saving time?
Yes, AST switches to ADT during summer months.
What are some interesting facts about AST?
Puerto Rico uses AST year-round and does not observe DST. AST is 1 hour ahead of EST.
Which cities are in the SAST timezone?
Major cities in the SAST timezone include Johannesburg, Cape Town, Durban, Pretoria, Port Elizabeth.
What is the UTC offset for SAST?
South Africa Standard Time (SAST) is at UTC+02:00.
What should I know about the SAST timezone?
South Africa does not observe daylight saving time. SAST is the same offset as EET and Israel Standard Time.
When is it midnight in AST, what time is it in SAST?
When it is 12:00 AM (midnight) in AST (AST), it is +6h later in SAST (SAST).
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See every conversion from AST →·See every conversion from SAST →