Time Zone Converter 2025
Convert time between any two time zones worldwide in seconds. Choose a city or UTC offset, pick your date and time, and instantly see the exact local time at your destination — with full Daylight Saving Time support. Perfect for international meetings, travel planning, and remote team scheduling.
How to Convert Between Time Zones
Every time zone is defined by its UTC offset — the number of hours and minutes it is ahead of or behind Coordinated Universal Time (UTC). To convert a time from one zone to another, you calculate the difference between their UTC offsets and add or subtract that from the original time.
For example, if it is 3:00 PM in London (UTC+0) and you want the time in New York (UTC−5), subtract 5 hours to get 10:00 AM New York time. This calculator does all of this automatically — including handling date changes when crossing midnight.
What Is Daylight Saving Time (DST)?
Daylight Saving Time is the practice of setting clocks 1 hour forward in spring and 1 hour back in autumn to make better use of daylight. About 70 countries observe DST, including the United States, Canada, most of Europe, and parts of Australia. This means a city's UTC offset changes during the year — for example, New York is UTC−5 in winter (EST) and UTC−4 in summer (EDT). This converter uses the IANA tz database so DST is handled automatically based on the exact date you select.
UTC Offsets Around the World
Pacific Islands, Alaska, Hawaii, mainland Americas
UK, Ireland, Portugal, West & Central Africa
Eastern Europe, Middle East, East Africa, UAE
Pakistan (UTC+5), India (UTC+5:30), Bangladesh (UTC+6), Myanmar (UTC+6:30)
Thailand, Vietnam, China, Japan, South Korea
Australia, Pacific Islands, New Zealand
Tips for Scheduling International Meetings
When scheduling across time zones, keep these tips in mind:
- Always confirm whether a location observes DST — and when it starts and ends — before booking recurring meetings.
- Check if the date changes at the destination. A 9 PM call in London on Monday could be Tuesday morning in Tokyo.
- Use UTC as a neutral reference when communicating times across many countries simultaneously.
- Countries like India (UTC+5:30) and Nepal (UTC+5:45) use half- and quarter-hour offsets, which can be easy to miscalculate manually.
- When one country switches clocks and another doesn't, the time difference between them changes temporarily — always use a live converter like this one during DST transition weeks.
Countries That Do Not Use DST
Most countries near the equator have consistent day length year-round and do not observe Daylight Saving Time. These include Bangladesh, India, China, Japan, Singapore, Malaysia, Thailand, the Philippines, Indonesia, Pakistan, Egypt, Saudi Arabia, UAE, Kenya, Nigeria, and nearly all of Africa and Southeast Asia. If both your source and destination are in this group, the time difference between them stays constant all year.
Frequently Asked Questions
Select your source time zone, enter the date and time you want to convert, then select your destination time zone and click Convert. The tool instantly shows the equivalent local time, the UTC offsets, the time difference, and whether Daylight Saving Time applies. You can also use the ⇅ swap button to reverse the conversion direction.
UTC (Coordinated Universal Time) is the global standard time reference — it has no DST and never changes. Every world time zone is expressed as a UTC offset. For example, New York is UTC−5 in winter, London is UTC+0, Dubai is UTC+4, Bangladesh is UTC+6, and Tokyo is UTC+9. Converting between two zones means calculating the difference in their UTC offsets.
Yes. This tool uses the IANA tz database — the same database used by Windows, macOS, Android, and iOS — so it automatically applies the correct DST rules based on the exact date you select. The result will show a DST notice whenever one or both zones are observing summer time on that date.
GMT (Greenwich Mean Time) is a geographic time zone based at the Royal Observatory in London. UTC is an atomic-clock standard maintained by international bodies. They share the same offset (UTC+0 = GMT+0) and for everyday purposes are interchangeable. However, UTC is the modern standard used by computers, aviation, and global communications, while GMT is still used in some legal and historical contexts.
There are 24 standard time zones based on 15° longitude increments, but in practice the world uses about 38–40 distinct UTC offsets. This is because some countries use half-hour offsets (India at UTC+5:30, Iran at UTC+3:30, Venezuela at UTC−4:30) or even quarter-hour offsets (Nepal at UTC+5:45). This converter supports all of them through the full IANA timezone list.
Countries near the equator — including Bangladesh, India, China, Japan, Singapore, Thailand, the Philippines, most of Africa, and most of the Middle East — do not observe DST because their day length stays relatively consistent year-round. DST is mainly observed in North America, Europe, and parts of South America and Australia. Russia, Japan, and China previously observed DST but have abolished it.
When the converted time crosses midnight, the date advances (or goes back) by one day at the destination. For example, converting 10:00 PM Monday in Los Angeles (UTC−8) to Tokyo (UTC+9) gives 3:00 PM Tuesday — a 17-hour difference that crosses midnight. This converter always shows the correct destination date alongside the converted time so you are never caught off guard.