AST to Karachi
+9hAST
ASTSOURCEKarachi
PKTGreen rows indicate typical business hours (9 AM - 5 PM)
AST and PKT on the World Map
The map below highlights the AST (Atlantic Standard Time) and PKT (Pakistan 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.
PKT – Pakistan Standard Time
UTC+05:00Pakistan Standard Time (PKT) is the time zone for Pakistan, 5 hours ahead of UTC.
- •Pakistan does not observe daylight saving time.
- •Karachi is one of the world's most populous cities.
- •PKT is the same offset as Uzbekistan (UZT) and Yekaterinburg (YEKT).
About Karachi
WikipediaKarachi operates on Pakistan Standard Time (PKT), UTC+5. As Pakistan's financial hub and largest port city, Karachi time drives South Asian commerce.
Karachi is one of the fastest-growing megacities in the world.
AST to Karachi Time Difference – Complete Guide
AST runs on Atlantic Standard Time (AST) at UTC-04:00. Karachi runs on Pakistan Standard Time (PKT) at UTC+05:00. That puts AST 9 hours ahead of Karachi — a difference of +9h at the current offsets.
In practice, when it is 9:00 AM in AST it is 6:00 PM in Karachi. Midnight in AST is 9:00 AM in Karachi. Neither zone observes daylight saving time, so the offset between them stays constant all year.
AST to Karachi time conversion table
| AST (AST) | Karachi (PKT) | Day |
|---|---|---|
| 12:00 AM | 9:00 AM | same day |
| 6:00 AM | 3:00 PM | same day |
| 7:00 AM | 4:00 PM | same day |
| 8:00 AM | 5:00 PM | same day |
| 9:00 AM | 6:00 PM | same day |
| 12:00 PM | 9:00 PM | same day |
| 3:00 PM | 12:00 AM | next day |
| 5:00 PM | 2:00 AM | next day |
| 6:00 PM | 3:00 AM | next day |
| 9:00 PM | 6:00 AM | next day |
Why people convert AST to Karachi time
- Scheduling a call from AST to Karachi: a 10:00 AM start in AST lands at 7:00 PM in Karachi, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +9h gap: AST and Karachi 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 Karachi is 6:00 PM in AST.
- Keeping family and friends in sync: knowing that 8:00 PM in AST is 5:00 AM in Karachi 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 +9h gap is not.
- With a +9h gap there is no shared 9-to-5 window, so alternate the early start: one week AST takes the early slot, the next week Karachi does.
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 PKT (Pakistan Standard Time)
Pakistan Standard Time (PKT) is the time zone used throughout Pakistan. PKT does not observe daylight saving time. Pakistan is the 5th most populous country in the world.
Best time to call between AST and Karachi
With a +9h offset there is no overlap inside a normal 9 AM – 5 PM day. Karachi opens at 9:00 AM PKT, which is 6:00 PM in AST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
AST and Karachi have no shared working hours because of the +9h gap. Teams need to alternate early starts or rely on asynchronous handovers.
AST is 9 hours ahead of Karachi (AST UTC-04:00 → PKT UTC+05:00). 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
AST
☀ Currently in DST
Standard: UTC-04:00 · DST: UTC-03:00
Clocks fall back on Sun, Nov 1, 2026
Karachi
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 Karachi?
AST (AST, UTC-04:00) is 9 hours ahead of Karachi (PKT, UTC+05:00). The gap is currently +9h.
How do I convert AST time to Karachi time?
Add +9h to AST local time. For example, 9:00 AM in AST is 6:00 PM in Karachi.
What time is it in Karachi right now?
Karachi uses PKT at UTC+05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +9h offset from AST.
What is the best time to call Karachi from AST?
There is no shared working-hours window because of the +9h gap. The closest option is 1:00 PM in AST, which is 10:00 PM in Karachi.
Which is ahead, AST or Karachi?
AST is 9 hours ahead of Karachi. When it is 12:00 PM in AST it is 9:00 PM in Karachi.
Do AST and Karachi use different time zones?
AST uses AST at UTC-04:00, while Karachi (Pakistan) uses PKT at UTC+05:00. The IANA identifiers are America/Halifax and Asia/Karachi.
Does daylight saving time affect the AST–Karachi difference?
Neither zone observes daylight saving time, so the +9h offset between AST and Karachi 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 Karachi?
Not normally. The +9h gap only pushes the date over for late-evening times.
What is the time difference between AST and Karachi?
Karachi is +9h from AST.
What timezone is AST in?
AST operates on its local timezone.
What timezone is Karachi in?
Karachi operates on Pakistan Standard Time (PKT), UTC+5. As Pakistan's financial hub and largest port city, Karachi time drives South Asian commerce.
What are the business hours in Karachi?
Standard business hours in Karachi are 9:00 AM - 5:00 PM PKT.
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 PKT timezone?
Major cities in the PKT timezone include Karachi, Lahore, Islamabad, Rawalpindi, Faisalabad, Peshawar.
What is the UTC offset for PKT?
Pakistan Standard Time (PKT) is at UTC+05:00.
What should I know about the PKT timezone?
Pakistan does not observe daylight saving time. Karachi is one of the world's most populous cities.
When is it midnight in AST, what time is it in Karachi?
When it is 12:00 AM (midnight) in AST (AST), it is +9h later in Karachi (PKT).
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