Time Zone Converter
Pick a place, a date and a time, then add the cities you need. You see the same moment in every zone - with daylight saving applied for that exact date, the UTC offset and a +1 day marker - and a meeting planner that highlights the hours inside everyone's working day.
Meeting planner: hours that suit everyone
How the conversion works
A time zone is an offset from Coordinated Universal Time (UTC) plus a set of rules for when that offset changes. Pakistan is UTC+5 all year. The UK is UTC+0 in winter and UTC+1 (British Summer Time) from the last Sunday of March to the last Sunday of October. New York is UTC−5 in winter and UTC−4 from the second Sunday of March to the first Sunday of November.
The converter turns your date and time into one exact instant, then shows that instant in every zone you add, using the rules that apply on that date. The rules come from your browser's own copy of the international time-zone database, so nothing is looked up online.
When the clocks change
On the night clocks go forward, one hour does not exist: 2:30 a.m. on 8 March 2026 never happens in New York. The converter moves such a time forward by the jump, as phones do, and tells you. On the night clocks go back, one hour happens twice; the converter uses the first one and says so.
Worked example: a 3 p.m. call from Karachi
The converter opens with 15 January 2026, 3:00 p.m. in Karachi (UTC+5):
Move the same call to 15 July 2026 and London becomes 11:00, New York 06:00 and Sydney 20:00 - Pakistan has no daylight saving, but the other three have switched their clocks. That is why a fixed "London is 5 hours behind" rule is only right for half the year.
Pakistan time against common business zones
Pakistan Standard Time (PKT) is UTC+5 and does not change during the year, so the gap to other countries only moves when they change their clocks.
| Place | Winter (January) | Summer (July) | 9 a.m. in Karachi is (January) |
|---|---|---|---|
| London, UK | 5 hours behind | 4 hours behind | 4 a.m. |
| Dubai, UAE | 1 hour behind | 1 hour behind | 8 a.m. |
| Riyadh, Saudi Arabia | 2 hours behind | 2 hours behind | 7 a.m. |
| New York, US Eastern | 10 hours behind | 9 hours behind | 11 p.m. the day before |
| Los Angeles, US Pacific | 13 hours behind | 12 hours behind | 8 p.m. the day before |
| New Delhi, India | 30 minutes ahead | 30 minutes ahead | 9:30 a.m. |
| Sydney, Australia | 6 hours ahead | 5 hours ahead | 3 p.m. |
Frequently asked questions
What is the time difference between Pakistan and the UK?
What is the time difference between Pakistan and New York?
Does Pakistan use daylight saving time?
Why does the converter show '+1 day'?
How do I find a meeting time that suits everyone?
Is any of my information sent online?
What this calculator does not do
- It uses the time-zone rules built into your browser; a country that changes its rules at short notice may not be reflected until your browser updates.
- It does not know public holidays or office hours - the meeting planner only checks the working hours you set.
- Dates far in the past use today's knowledge of historical rules, which can be uncertain before about 1970.