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How Many Days Old
Find out how many days old anything is.
Time Zone Converter
Search for any city to see its current time, compare up to 4 time zones side by side, and find overlapping working hours for scheduling international meetings.
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London
UK · GMT+1
11:01:49
Thu 30 Apr
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New York
US · GMT-4
06:01:49
Thu 30 Apr
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Add city
Best meeting times (9am–6pm for all zones)
14:00 UTC
London: 15:00:00New York: 10:00:00
15:00 UTC
London: 16:00:00New York: 11:00:00
16:00 UTC
London: 17:00:00New York: 12:00:00
17:00 UTC
London: 18:00:00New York: 13:00:00
How to use the Time Zone Converter
View the default clocks
London and New York are shown by default. Each clock displays the live local time, date, and UTC offset.
Add more cities
Click the '+' card to search for any city or country. Up to 4 cities can be compared side by side.
Find your best meeting time
The meeting time finder shows UTC hours where all selected zones fall within standard business hours (9am–6pm local time). Green slots mean everyone is in their working day.
Remove a zone
Click the ✕ button on any clock card to remove it from the comparison.
About this Time Zone Converter
Coordinating across time zones is one of the most common challenges for remote teams, international travellers, and anyone with friends or family abroad. A misjudged time zone can mean missed meetings, calls that arrive in the middle of the night, or deadline confusion. The world is divided into 24 standard time zones, each roughly 15 degrees of longitude wide (since the Earth rotates 360° in 24 hours). However, political and practical considerations mean real time zones are irregular — some countries use half-hour or even 45-minute offsets, and boundaries follow country and state lines rather than neat longitudinal divisions. Daylight Saving Time adds another layer of complexity. The US, most of Europe, and parts of Australia shift their clocks by one hour twice a year — but on different dates. This means the offset between two cities isn't constant throughout the year. Our converter uses the IANA timezone database (the same standard used by all modern operating systems) which accounts for all DST rules and historical changes automatically. For remote teams, finding overlapping working hours is the key challenge. A London-Singapore team has almost no overlap in standard business hours (UTC+0 vs UTC+8 means London's 9am is Singapore's 5pm). Teams often resort to asynchronous communication or rotating meeting times to share the inconvenience fairly.
Frequently Asked Questions
Add all participants' cities to the converter. The meeting time finder highlights hours that fall within normal business hours (9am–6pm) for all selected zones simultaneously. Green slots are ideal; orange means some participants are outside standard hours.
UTC (Coordinated Universal Time) is the world's primary time standard. All time zones are expressed as offsets from UTC. For example, London in winter is UTC+0, New York is UTC-5, and Tokyo is UTC+9. UTC itself does not observe daylight saving time.
Most time zones are offset from UTC by whole hours, but some countries use half-hour or quarter-hour offsets. India (UTC+5:30), Nepal (UTC+5:45), Iran (UTC+3:30), and parts of Australia (UTC+9:30) are examples. These were set historically to align with solar noon or as political compromises.
Daylight saving time (DST) advances clocks by one hour in spring to extend evening daylight and reverts in autumn. The US, Canada, most of Europe, and parts of Australia observe DST, though on different schedules. Countries near the equator (like Singapore, India, and most of Africa) do not use DST. Our converter uses current IANA timezone data which accounts for DST automatically.