OmniCalcsTime Zone Converter
Convert a time between major world time zones instantly — great for meetings across continents.
How to Use This Converter
Enter the local date and time, choose the source and target zones, and read the result. Swap to reverse the direction.
- The offset list covers the most common business cities.
- For countries with daylight saving, check current dates — many change offsets in spring and autumn.
Frequently Asked Questions
Why is it not showing the right DST time?
This tool uses fixed standard offsets for simplicity. During daylight saving, add or subtract an hour where applicable.
What is UTC?
Coordinated Universal Time — the world's time standard, roughly equivalent to GMT. All zones are defined as offsets from it.
Why is the date different after conversion?
Crossing the international date line (or a large offset) can shift the calendar date. The result shows the correct date automatically.
Which timezone is Dubai/Riyadh?
Gulf Standard Time, UTC+4 (UAE) and UTC+3 (Saudi Arabia). This tool groups them at UTC+4 for simplicity — verify for Saudi events.
Practical Example
A 9:00 AM meeting in New York (EST, UTC−5) converts to 2:00 PM UTC, and Tokyo (UTC+9) is 11:00 PM the same day — a 14-hour difference. In summer, New York shifts to EDT (UTC−4), so the difference drops to 13 hours and the same 9:00 AM meeting would be at 10:00 PM in Tokyo.
- Enter 9:00 AM as the date-time, set from zone to New York (EST) and to zone to Tokyo, and read 11:00 PM.
What Your Results Mean
- Converted time — the same instant expressed in the target zone's local time, with the correct date when the span crosses midnight.
- Time difference — the offset between the two zones, such as +14 hours, calculated from fixed standard offsets.
- DST note — daylight saving is not applied automatically, so add or subtract an hour manually when a zone observes it.