Convert times between cities with clear offsets. Compare dates, overlaps, daylight shifts, and scheduling windows. Plan meetings across regions without confusion or missed hours.
Use the fields below to compare two timezones, estimate meeting end times, and review business-hour overlap.
| Source City | Target City | Reference Time | Typical Offset Difference | Scheduling Note |
|---|---|---|---|---|
| Karachi | London | 2026-03-28 14:00 | -05:00 | Afternoon in Karachi may align with London morning. |
| New York | Dubai | 2026-03-28 09:30 | +08:00 | Early New York meetings can reach Dubai evenings. |
| Tokyo | Los Angeles | 2026-03-28 18:00 | -16:00 | Date changes are common in this comparison. |
| Sydney | Singapore | 2026-03-28 10:00 | -03:00 | Useful for regional sales and support coverage. |
Core formula:
Target Time = Source Time + (Target UTC Offset − Source UTC Offset)
The calculator converts the selected source date and time into the source timezone, then applies the target timezone offset at that exact moment. Daylight saving rules are handled automatically by the timezone database, so the offset can change depending on the chosen date.
Working-hour overlap is found by converting both local work windows into absolute timestamps and calculating the shared interval between them.
It converts a chosen local time from one timezone into another timezone. It also shows UTC offsets, date shifts, meeting end times, and business-hour overlap.
Yes. The calculator uses timezone rules for the selected date, so daylight saving changes are reflected automatically when a location observes them.
Some timezone differences cross midnight. When that happens, the target location may show the previous or next calendar day compared with the source location.
Working-hour overlap is the amount of time when both selected locations are inside their defined business hours at the same moment.
Yes. It is useful for planning meetings, support coverage, remote work handoffs, webinar timing, and cross-region customer calls.
A positive sign means the target timezone is ahead of the source. A negative sign means the target timezone is behind the source.
The graph maps each source hour across the selected day to its corresponding target local hour, helping you spot convenient meeting windows quickly.
Yes. You can download a CSV report for spreadsheet analysis and a PDF report for sharing, printing, or documentation.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.