Nairobi to AST
-7hNairobi
EATSOURCEAST
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
EAT and AST on the World Map
The map below highlights the EAT (East Africa Time) and AST (Atlantic Standard Time) timezone regions across the globe.
EAT – East Africa Time
UTC+03:00East Africa Time (EAT) is the time zone for East Africa, 3 hours ahead of UTC.
- •Nairobi is a major tech hub in Africa, often called 'Silicon Savannah'.
- •Ethiopia uses its own calendar, which is 7-8 years behind the Gregorian calendar.
- •EAT is the same offset as MSK (Moscow Time).
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 Nairobi
WikipediaNairobi operates on East Africa Time (EAT), UTC+3. As the tech hub of Africa (Silicon Savannah), Nairobi leads African fintech and mobile innovation.
Nairobi National Park is the only national park within a capital city, with lions visible against the skyline.
Nairobi vs AST: Offsets, DST and Best Call Times
Nairobi runs on East Africa Time (EAT) at UTC+03:00. AST runs on Atlantic Standard Time (AST) at UTC-04:00. That puts Nairobi 7 hours behind AST — a difference of -7h at the current offsets.
In practice, when it is 9:00 AM in Nairobi it is 2:00 AM in AST. Midnight in Nairobi is 5:00 PM in AST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Nairobi to AST time conversion table
| Nairobi (EAT) | AST (AST) | 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 Nairobi to AST time
- Scheduling a call from Nairobi to AST: a 10:00 AM start in Nairobi lands at 3:00 AM in AST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Nairobi and AST are inside the 9-to-5 working day between 4:00 PM and 5:00 PM EAT time (9:00 AM–10:00 AM AST). That is roughly 1 hours of usable overlap.
- Coordinating a Nairobi-based team with AST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM EAT" is unambiguous; "3 PM" across a -7h gap is not.
- Block 4:00 PM–5:00 PM EAT as the recurring meeting window if you work primarily from Nairobi and need AST colleagues present.
About EAT (East Africa Time)
East Africa Time (EAT) is used in the countries of East Africa including Kenya, Ethiopia, Tanzania, Uganda, and others. EAT does not observe daylight saving time and shares the same offset as Moscow Standard Time (MSK).
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 Nairobi and AST
Both Nairobi and AST sit inside the 9 AM – 5 PM working day between 4:00 PM–5:00 PM EAT, which is 9:00 AM–10:00 AM AST. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Nairobi and AST overlap for only 60 minutes (4:00 PM–5:00 PM EAT), so meetings have to be booked precisely.
Nairobi is 7 hours behind AST (EAT UTC+03:00 → AST UTC-04:00). The shared working window is 4:00 PM–5:00 PM EAT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Nairobi
Does not observe DST
AST
☀ 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 Nairobi and AST?
Nairobi (EAT, UTC+03:00) is 7 hours behind AST (AST, UTC-04:00). The gap is currently -7h.
How do I convert Nairobi time to AST time?
Add -7h to Nairobi local time. For example, 9:00 AM in Nairobi is 2:00 AM in AST.
What time is it in AST right now?
AST uses AST at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -7h offset from Nairobi.
What is the best time to call AST from Nairobi?
Call between 4:00 PM and 5:00 PM EAT — that maps to 9:00 AM–10:00 AM AST and keeps both parties inside the working day.
Which is behind, Nairobi or AST?
Nairobi is 7 hours behind AST. When it is 12:00 PM in Nairobi it is 5:00 AM in AST.
Do Nairobi and AST use different time zones?
Nairobi (Kenya) uses EAT at UTC+03:00, while AST uses AST at UTC-04:00. The IANA identifiers are Africa/Nairobi and America/Halifax.
Does daylight saving time affect the Nairobi–AST difference?
Neither zone observes daylight saving time, so the -7h offset between Nairobi and AST is fixed all year.
Which other cities share Nairobi's time zone?
EAT also covers Nairobi, Addis Ababa, Dar es Salaam, Kampala, Mogadishu, Antananarivo.
Which countries use EAT, Nairobi's zone?
EAT is used in Kenya, Ethiopia, Tanzania, Uganda, Somalia, Madagascar, Eritrea, Djibouti.
Is there a day difference between Nairobi and AST?
Not normally. The -7h gap only pushes the date over the previous day.
What is the time difference between Nairobi and AST?
AST is -7h from Nairobi.
What timezone is Nairobi in?
Nairobi operates on East Africa Time (EAT), UTC+3. As the tech hub of Africa (Silicon Savannah), Nairobi leads African fintech and mobile innovation.
What timezone is AST in?
AST operates on its local timezone.
What are the business hours in Nairobi?
Standard business hours in Nairobi are 8:00 AM - 5:00 PM EAT.
Which countries use EAT (East Africa Time)?
EAT is used in Kenya, Ethiopia, Tanzania, Uganda, Somalia, Madagascar, and 2 more countries.
Does EAT observe daylight saving time?
No, EAT does not observe daylight saving time and remains at UTC+03:00 year-round.
What are some interesting facts about EAT?
Nairobi is a major tech hub in Africa, often called 'Silicon Savannah'. Ethiopia uses its own calendar, which is 7-8 years behind the Gregorian calendar.
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 Nairobi, what time is it in AST?
When it is 12:00 AM (midnight) in Nairobi (EAT), it is -7h later in AST (AST).
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