Manila to AST
-12hManila
PHTSOURCEAST
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
PHT and AST on the World Map
The map below highlights the PHT (Philippine Time) and AST (Atlantic Standard Time) timezone regions across the globe.
PHT – Philippine Time
UTC+08:00Philippine Time (PHT, UTC+08:00) is the time zone for the Philippines, 8 hours ahead of UTC.
- •Philippine Time does not observe daylight saving, so UTC+08:00 is fixed all year.
- •PHT shares its offset with China, Hong Kong, Singapore and Malaysia.
- •Manila is one of the largest outsourcing hubs in the world.
- •The Philippines spans one time zone despite being an archipelago of over 7,600 islands.
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 Manila
WikipediaManila operates on Philippine Time (PHT), UTC+8. As a major BPO hub, Manila time coordinates with US client hours for customer support operations.
Manila is the most densely populated city in the world.
Time Conversion Guide: Manila to AST
Manila runs on Philippine Standard Time (PHT) at UTC+08:00. AST runs on Atlantic Standard Time (AST) at UTC-04:00. That puts Manila 12 hours behind AST — a difference of -12h at the current offsets.
In practice, when it is 9:00 AM in Manila it is 9:00 PM in AST on the previous day. Midnight in Manila is 12:00 PM in AST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Manila to AST time conversion table
| Manila (PHT) | AST (AST) | Day |
|---|---|---|
| 12:00 AM | 12:00 PM | previous day |
| 6:00 AM | 6:00 PM | previous day |
| 7:00 AM | 7:00 PM | previous day |
| 8:00 AM | 8:00 PM | previous day |
| 9:00 AM | 9:00 PM | previous day |
| 12:00 PM | 12:00 AM | same day |
| 3:00 PM | 3:00 AM | same day |
| 5:00 PM | 5:00 AM | same day |
| 6:00 PM | 6:00 AM | same day |
| 9:00 PM | 9:00 AM | same day |
Why people convert Manila to AST time
- Scheduling a call from Manila to AST: a 10:00 AM start in Manila lands at 10:00 PM in AST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -12h gap: Manila and AST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in AST is 9:00 PM in Manila.
- Booking travel or deliveries: tracking AST local time against Manila keeps pickup windows and arrival estimates honest across the -12h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM PHT" is unambiguous; "3 PM" across a -12h gap is not.
- With a -12h gap there is no shared 9-to-5 window, so alternate the early start: one week Manila takes the early slot, the next week AST does.
About PHT (Philippine Time)
Philippine Time (PHT) is fixed at UTC+08:00 all year. The Philippines has not observed daylight saving time since 1978, apart from a brief trial in 1990. PHT shares its offset with China Standard Time, Hong Kong Time, Singapore Time, Malaysian Time and Australian Western Standard Time, which makes Manila a convenient bridge for scheduling across East and Southeast Asia. As one of the world's largest centres for business process outsourcing, Manila keeps overlapping hours with both Australia and, on early shifts, the United States, and its contact-centre schedules are usually planned around Manila local time.
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 Manila and AST
With a -12h offset there is no overlap inside a normal 9 AM – 5 PM day. AST opens at 9:00 AM AST, which is 9:00 PM in Manila, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Manila and AST have no shared working hours because of the -12h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Manila is 12 hours behind AST (PHT UTC+08:00 → AST UTC-04:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Manila
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 Manila and AST?
Manila (PHT, UTC+08:00) is 12 hours behind AST (AST, UTC-04:00). The gap is currently -12h.
How do I convert Manila time to AST time?
Add -12h to Manila local time. For example, 9:00 AM in Manila is 9:00 PM in AST (previous day).
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 -12h offset from Manila.
What is the best time to call AST from Manila?
There is no shared working-hours window because of the -12h gap. The closest option is 1:00 PM in Manila, which is 1:00 AM in AST.
Which is behind, Manila or AST?
Manila is 12 hours behind AST. When it is 12:00 PM in Manila it is 12:00 AM in AST.
Do Manila and AST use different time zones?
Manila (Philippines) uses PHT at UTC+08:00, while AST uses AST at UTC-04:00. The IANA identifiers are Asia/Manila and America/Halifax.
Does daylight saving time affect the Manila–AST difference?
Neither zone observes daylight saving time, so the -12h offset between Manila and AST is fixed all year.
Which other cities share Manila's time zone?
PHT also covers Manila, Quezon City, Davao City, Cebu City, Zamboanga.
Which countries use PHT, Manila's zone?
PHT is used in Philippines.
Is there a day difference between Manila and AST?
Sometimes. The -12h gap is large enough that 8:00 PM or later in Manila already falls on the in AST.
What is the time difference between Manila and AST?
AST is -12h from Manila.
What timezone is Manila in?
Manila operates on Philippine Time (PHT), UTC+8. As a major BPO hub, Manila time coordinates with US client hours for customer support operations.
What timezone is AST in?
AST operates on its local timezone.
What are the business hours in Manila?
Standard business hours in Manila are 8:00 AM - 5:00 PM PHT.
Which countries use PHT (Philippine Time)?
PHT is used in Philippines.
Does PHT observe daylight saving time?
No, PHT does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about PHT?
Philippine Time does not observe daylight saving, so UTC+08:00 is fixed all year. PHT shares its offset with China, Hong Kong, Singapore and Malaysia.
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 Manila, what time is it in AST?
When it is 12:00 AM (midnight) in Manila (PHT), it is -12h later in AST (AST).
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