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Karachi to AST

-9h

Karachi

PKTSOURCE
Pakistan · UTC+05:00
HH12
:
MM00
  
12:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM

AST

AST
UTC-03:00☀ DST active
HH03
:
MM00
  
03:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM
Karachi
AST
12:00 AM
4:00 PM-1
2:00 AM
6:00 PM-1
4:00 AM
8:00 PM-1
6:00 AM
10:00 PM-1
8:00 AM
12:00 AM
10:00 AM
2:00 AM
12:00 PM
4:00 AM
2:00 PM
6:00 AM
4:00 PM
8:00 AM
6:00 PM
10:00 AM
8:00 PM
12:00 PM
10:00 PM
2:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

PKT and AST on the World Map

The map below highlights the PKT (Pakistan Standard Time) and AST (Atlantic Standard Time) timezone regions across the globe.

PKTASTKarachiLahoreIslamabadRawalpindiHalifaxSan JuanSanto DomingoCaracas
PKT Zone
→
AST Zone

Explore all world timezones interactively →

PKT – Pakistan Standard Time

UTC+05:00

Pakistan Standard Time (PKT) is the time zone for Pakistan, 5 hours ahead of UTC.

Countries in PKT
Pakistan
Major Cities in PKT
KarachiLahoreIslamabadRawalpindiFaisalabadPeshawar
Key Facts about PKT
  • •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).
Daylight Saving:No – UTC+05:00 year-round
Learn more about PKT on Wikipedia

AST – Atlantic Standard Time

UTC-04:00

Atlantic Standard Time (AST) is the time zone for the Canadian Atlantic provinces and the Caribbean, 4 hours behind UTC.

Countries in AST
Canada (Atlantic provinces)Puerto RicoUS Virgin IslandsDominican RepublicVenezuelaBoliviaBarbadosTrinidad and Tobago
Major Cities in AST
HalifaxSan JuanSanto DomingoCaracasLa PazFrederictonCharlottetown
Key Facts about AST
  • •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.
Daylight Saving:Yes – switches to ADT
Learn more about AST on Wikipedia

About Karachi

Wikipedia

Karachi operates on Pakistan Standard Time (PKT), UTC+5. As Pakistan's financial hub and largest port city, Karachi time drives South Asian commerce.

Population:14.9 million
Metro:16.5 million
Business Hours:9:00 AM - 5:00 PM PKT
Currency:PKR (₨)
Stock Exchange:PSX (Pakistan Stock Exchange)
Key Landmarks
Quaid-e-Azam's MausoleumMohatta PalaceClifton BeachPort GrandPAF Museum
Did You Know?

Karachi is one of the fastest-growing megacities in the world.

Learn more about PKT timezone →

Karachi to AST Time Difference – Complete Guide

Karachi runs on Pakistan Standard Time (PKT) at UTC+05:00. AST runs on Atlantic Standard Time (AST) at UTC-04:00. That puts Karachi 9 hours behind AST — a difference of -9h at the current offsets.

In practice, when it is 9:00 AM in Karachi it is 12:00 AM in AST. Midnight in Karachi is 3:00 PM in AST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Karachi to AST time conversion table

Karachi (PKT)AST (AST)Day
12:00 AM3:00 PMprevious day
6:00 AM9:00 PMprevious day
7:00 AM10:00 PMprevious day
8:00 AM11:00 PMprevious day
9:00 AM12:00 AMsame day
12:00 PM3:00 AMsame day
3:00 PM6:00 AMsame day
5:00 PM8:00 AMsame day
6:00 PM9:00 AMsame day
9:00 PM12:00 PMsame day

Why people convert Karachi to AST time

  • Scheduling a call from Karachi to AST: a 10:00 AM start in Karachi lands at 1:00 AM in AST, so you can confirm the slot without doing the arithmetic yourself.
  • Handling a -9h gap: Karachi 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 12:00 AM in Karachi.
  • Coordinating a Karachi-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 PKT" 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 Karachi takes the early slot, the next week AST does.

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.

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 Karachi and AST

With a -9h offset there is no overlap inside a normal 9 AM – 5 PM day. AST opens at 9:00 AM AST, which is 12:00 AM in Karachi, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Karachi and AST have no shared working hours because of the -9h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Karachi is 9 hours behind AST (PKT UTC+05:00 → 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

Karachi

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:

⏳
History of Timekeeping
From sundials to atomic clocks - 5000 years of measuring time
🌍
How Time Zones Work
UTC, offsets, and why zones don't follow straight lines
☀️
Daylight Saving Time
DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Karachi and AST?

Karachi (PKT, UTC+05:00) is 9 hours behind AST (AST, UTC-04:00). The gap is currently -9h.

How do I convert Karachi time to AST time?

Add -9h to Karachi local time. For example, 9:00 AM in Karachi is 12:00 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 -9h offset from Karachi.

What is the best time to call AST from Karachi?

There is no shared working-hours window because of the -9h gap. The closest option is 1:00 PM in Karachi, which is 4:00 AM in AST.

Which is behind, Karachi or AST?

Karachi is 9 hours behind AST. When it is 12:00 PM in Karachi it is 3:00 AM in AST.

Do Karachi and AST use different time zones?

Karachi (Pakistan) uses PKT at UTC+05:00, while AST uses AST at UTC-04:00. The IANA identifiers are Asia/Karachi and America/Halifax.

Does daylight saving time affect the Karachi–AST difference?

Neither zone observes daylight saving time, so the -9h offset between Karachi and AST is fixed all year.

Which other cities share Karachi's time zone?

PKT also covers Karachi, Lahore, Islamabad, Rawalpindi, Faisalabad, Peshawar.

Which countries use PKT, Karachi's zone?

PKT is used in Pakistan.

Is there a day difference between Karachi and AST?

Not normally. The -9h gap only pushes the date over the previous day.

What is the time difference between Karachi and AST?

AST is -9h from Karachi.

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 timezone is AST in?

AST operates on its local timezone.

What are the business hours in Karachi?

Standard business hours in Karachi are 9:00 AM - 5:00 PM PKT.

Which countries use PKT (Pakistan Standard Time)?

PKT is used in Pakistan.

Does PKT observe daylight saving time?

No, PKT does not observe daylight saving time and remains at UTC+05:00 year-round.

What are some interesting facts about PKT?

Pakistan does not observe daylight saving time. Karachi is one of the world's most populous cities.

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 Karachi, what time is it in AST?

When it is 12:00 AM (midnight) in Karachi (PKT), it is -9h later in AST (AST).

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