← All blog posts · 4 November 2026

Karachi to New York Time Difference — And Why It Changes Twice a Year

Here is the short answer: New York is 9 hours behind Karachi while the US is on daylight saving time, and 10 hours behind the rest of the year. If you have ever arranged a call between Pakistan and the US East Coast and found the gap had quietly grown or shrunk by an hour since last time, this is why — and this guide explains exactly when it changes, with the 2026 dates and worked examples.

The two offsets behind the gap

A time difference is just one city's UTC offset minus the other's. Karachi keeps Pakistan Standard Time (PKT), UTC+5, all year round — Pakistan does not observe daylight saving. New York, on the US East Coast, alternates between two offsets:

• Eastern Standard Time (EST), UTC−5 — in winter
• Eastern Daylight Time (EDT), UTC−4 — in summer

So in winter the maths is +5 minus −5 = 10 hours. In summer it is +5 minus −4 = 9 hours. Karachi never moves; the whole change happens on the New York side, twice a year. You can watch both offsets live on the Karachi clock page and the New York clock page.

The 2026 dates when the difference changes

In the United States, daylight saving begins on the second Sunday of March and ends on the first Sunday of November. In 2026 those dates are:

• Sunday 8 March 2026 — New York springs forward to EDT; the Karachi gap shrinks from 10 hours to 9.
• Sunday 1 November 2026 — New York falls back to EST; the gap grows from 9 hours back to 10.

The switch happens at 2:00 am local time in New York, so for a few hours on those two Sundays the difference is briefly in between the usual values. Every other day of the year it is cleanly 9 or 10 hours. Our time difference calculator derives the gap from the IANA rules for whatever date you pick, so it is correct on transition days too.

Worked examples for planning calls

Karachi is ahead, so New York's clock always shows an earlier time on the same calendar day for typical working hours:

• Summer (9-hour gap): 6:00 pm in Karachi = 9:00 am the same day in New York. 9:00 am in Karachi = midnight (12:00 am) in New York that same morning.
• Winter (10-hour gap): 6:00 pm in Karachi = 8:00 am in New York. 9:00 am in Karachi = 11:00 pm in New York the previous evening.

The practical overlap for business is Karachi's afternoon and evening against New York's morning. A standing weekly call set at 7:00 pm Karachi time lands at 10:00 am New York in summer but 9:00 am in winter — worth warning the other side about in the last week of October and the first week of March. To convert one specific meeting time, use the time zone converter with the actual date, rather than assuming the gap you remember.

Why Pakistan doesn't change its clocks

Pakistan sits close enough to the equator that daylight hours vary far less across the year than in North America or Europe, so the benefit of moving clocks is small. The country did experiment with daylight saving for a single year, in 2009, and has stayed on UTC+5 permanently since. That fixed offset is precisely what makes the Karachi–New York gap breathe in and out: one side is anchored, the other side moves. The same pattern applies to Karachi against London, Toronto and every other daylight-saving city — the gap you learned in July is not the gap you get in January. Our guide to how time zones work explains the system behind all of this.