← All blog posts · 5 November 2026

Best Meeting Times Between Karachi, London and New York

If your team spans Pakistan, the UK and the US East Coast, you have probably noticed the same frustration: a time that suits two of the three cities is awkward for the third. That is not bad planning — it is arithmetic. Karachi is 10 hours ahead of New York in winter, so the three working days simply do not overlap. Here is the best compromise slot, why it works, and how it moves when the clocks change.

The short answer: the golden window

The best slot for all three cities is 14:00–16:00 in London, 09:00–11:00 in New York, and 19:00–21:00 in Karachi during the winter months (roughly November to March). It is the fairest deal available: New York starts its day with the call, London takes it in the afternoon, and Karachi joins in the early evening. Nobody has to meet at midnight, and nobody has to start before 09:00.

In summer the same London and New York clock times still work — but Karachi shifts one hour earlier, to 18:00–20:00. That is because Karachi stays on Pakistan Standard Time (UTC+5) all year, while London moves to British Summer Time (UTC+1) and New York to Eastern Daylight Time (UTC−4). If you run a recurring meeting on a fixed London time, tell your Karachi colleagues to expect it one hour earlier once the UK clocks go forward. Our converter shows the exact shift for any date, so you never have to guess.

Why no 9-to-5 window exists

Take a standard 09:00–17:00 working day in each city and lay the three days on one timeline. In winter, Karachi's working day runs 04:00–12:00 UTC, London's runs 09:00–17:00 UTC, and New York's runs 14:00–22:00 UTC. The three bands share no hour at all: by the time New York's working day begins, Karachi's has already ended. Stretching the definition of "working hours" is the only fix — and the golden window above is the smallest stretch that works, asking Karachi for the early evening rather than the middle of the night.

The gaps explain the whole problem. Karachi to London is 5 hours in winter and 4 hours in summer; Karachi to New York is 10 hours in winter and 9 in summer; London to New York is 5 hours for most of the year. For the full story of why the Karachi–New York gap changes, read our guide to the Karachi to New York time difference. And for a few weeks each spring and autumn, when the US and Europe change their clocks on different Sundays, the London–New York gap briefly shrinks to 4 hours — the one time of year a recurring meeting can quietly move an hour for one side only.

If only two cities need to meet

Two-city meetings are much easier, so split the call when you can. Karachi and London share a generous overlap: London's morning is Karachi's afternoon, so anything from late morning in London to late afternoon in Karachi works comfortably. London and New York overlap from about 14:00–17:00 in London, which is 09:00–12:00 in New York — the classic transatlantic slot. Karachi and New York is the hard pair: the only humane overlap is New York morning with Karachi evening, roughly 09:00–11:00 in New York against 19:00–21:00 in Karachi in winter (18:00–20:00 in summer).

Four rules that prevent mistakes

1. Put the UTC time in every invite. "14:00 London / 09:00 New York / 19:00 Karachi" is good; adding "14:00 UTC (winter)" makes it unambiguous even if someone's calendar misreads a zone. 2. Pin recurring meetings to a named zone, not a fixed offset. A meeting stored as "Europe/London 14:00" follows British Summer Time automatically; one stored as "UTC+0 14:00" will be an hour wrong all summer. 3. Rotate the inconvenient slot. If Karachi always takes the evening, share the burden sometimes with a New York-early or London-early alternative — fairness keeps a distributed team willing. 4. Recheck around clock-change weekends. The US changes clocks on the second Sunday in March and the first Sunday in November; Europe changes on the last Sundays of March and October. In those mismatch weeks, verify every recurring slot with the time difference calculator before sending it out.

One last habit helps more than any tool: before you propose a time, glance at the live clocks on our homepage or the three city pages. Seeing all three times side by side takes five seconds, and it is the fastest way to avoid proposing a meeting that lands at 02:00 for somebody. For the background on how these zones work at all, our guide to how time zones work explains UTC, offsets and daylight saving in plain language.