Need to know what time it is in another city? Use our Time Zone Converter and World Clock to compare time zones, calculate time differences, and convert a specific date and time between locations around the world.
Choose your base city or time zone, enter a date and time, and add one or more destinations. The converter shows the corresponding local time, date, UTC offset, and time difference while accounting for applicable daylight saving time rules.
Whether you are scheduling an international meeting, calling someone overseas, planning a trip, following a global event, or coordinating a remote team, you can compare world times in seconds.
How to Use the Time Zone Converter
Using the time zone converter is simple.
Start by selecting the date and time you want to convert. You can enter a specific time or use the current time. Next, choose your base city or time zone, such as New York, London, Dubai, Tokyo, Sydney, UTC, Eastern Time, or Pacific Time.
Then add the destination you want to compare.
For example, you can compare:
| Base Location | Destination | What You Can Check |
| New York | London | Local time and time difference |
| Los Angeles | Tokyo | Same moment in both cities |
| London | Dubai | UTC offset and local date |
| India | New York | International meeting time |
| Sydney | Singapore | Business-hour overlap |
| UTC | Any location | Local time from UTC |
The converter automatically shows whether the destination is ahead or behind the base location. It can also help identify when a conversion moves into the previous day or next day, which is especially useful when comparing locations on opposite sides of the world.
Compare Time Zones Around the World
A time zone comparison tells you what the same moment looks like in two or more locations.
If it is morning in one country, it may already be afternoon, evening, or even the next calendar day somewhere else. Instead of calculating these differences manually, a time zone comparison tool converts the selected moment for you.
This is particularly helpful when comparing major international cities such as New York, Los Angeles, London, Paris, Berlin, Dubai, Mumbai, Singapore, Beijing, Tokyo, Seoul, Sydney, and Auckland.
Unlike a simple fixed-hour calculator, a date-aware time zone converter can account for changes in UTC offsets that occur when regions enter or leave daylight saving time. This matters because the difference between two cities is not always constant throughout the year. IANA maintains the widely used Time Zone Database containing historical and current civil-time rules for locations worldwide.
World Clock for Current Time Around the Globe
A world clock makes it easy to check the current local time in cities and countries around the world.
Rather than searching separately for “time in London,” “time in New York,” “time in Dubai,” or “time in Tokyo,” you can compare multiple locations from one place.
This is useful for people who work, travel, communicate, or do business internationally. A world clock can quickly answer questions such as whether colleagues in Europe are still working, whether it is too early to call someone in the United States, or whether an event in Asia begins today or tomorrow in your local time.
For a broader directory of live city times, you can also explore the World Clock on CurrentDateTime.
What Is a Time Zone?
A time zone is a set of rules that determines local civil time for a particular location or region in relation to Coordinated Universal Time, commonly known as UTC.
A location may be described as a certain number of hours and minutes ahead of or behind UTC. For example, a UTC+05:00 location is five hours ahead of UTC, while a UTC-08:00 location is eight hours behind it.
However, a time zone is more than a fixed UTC offset. A named geographical time zone can also contain rules governing historical changes and daylight saving transitions. RFC 9557 describes a time zone as a set of rules connecting local time to UTC and notes that named zones such as Europe/Paris or Asia/Tokyo can account for rule changes over time.
That is why choosing a city or geographic time zone is often more reliable than relying only on an abbreviation.
UTC Offsets Explained
UTC, or Coordinated Universal Time, provides the reference used to express time offsets around the world.
A UTC offset tells you how far local time differs from UTC at a particular moment.
For example, if one location is UTC+04:00 and another is UTC+09:00, the second location is five hours ahead when those offsets are in effect.
The basic relationship is:
Local Time = UTC + UTC Offset
This looks simple, but manual time conversion becomes less reliable when daylight saving rules, historical dates, unusual half-hour or quarter-hour offsets, or changes in government policy are involved.
For that reason, the easiest way to compare international times is to select the actual city or time zone and let the converter apply the appropriate rules for your chosen date.
Time Difference Calculator
The tool also works as a time difference calculator.
Instead of only telling you the converted clock time, it helps you understand how many hours one location is ahead of or behind another.
Suppose you are organizing a video call between people in North America, Europe, the Middle East, and Asia. Knowing only the local time in each place can become confusing. Seeing the actual time difference makes it much easier to choose a practical meeting time.
This is particularly valuable for remote teams, customer support operations, freelancers, international businesses, students attending online classes, livestream viewers, travelers, and families living in different countries.
Daylight Saving Time and Time Zone Conversion
Daylight Saving Time (DST) is one of the main reasons time-zone differences can change during the year.
Some regions move their clocks forward for part of the year and return to standard time later. Other countries do not observe daylight saving time at all.
For example, U.S. Eastern Time normally uses EST at UTC-05:00 during standard time and EDT at UTC-04:00 during daylight time. NIST confirms these different standard and daylight offsets and notes that most of Arizona, for example, does not follow the same seasonal Mountain Time pattern as many neighboring areas.
This means you should not assume that two international cities are always the same number of hours apart.
A meeting scheduled several months in advance may have a different time difference from the one you see today if one region changes its clocks while the other does not.
For accurate planning, convert the actual meeting date, not just today’s time.
Standard Time vs Daylight Time
Standard time is the normal base time assigned to a region, while daylight time is a seasonal clock adjustment used in some jurisdictions.
In the United States, for example, NIST states that the current general DST rule begins on the second Sunday in March and ends on the first Sunday in November, although not every U.S. location observes it.
Other countries may use completely different rules or no seasonal clock change at all. Rules can also change because time-zone policy is controlled by governments and local authorities. IANA therefore updates its Time Zone Database as such changes occur.
A date-aware converter removes the need to memorize these transitions.
UTC vs GMT: What Is the Difference?
UTC and GMT are often treated as equivalent when discussing everyday clock time because both are associated with an offset of zero hours.
However, they are not exactly the same concept.
UTC is the modern global reference used to coordinate time, while GMT historically refers to mean solar time at Greenwich and is also used as the name of a civil time zone in certain contexts.
For most everyday conversions, both may appear as UTC+00:00, but UTC is generally the clearer reference when working with international timestamps, software systems, servers, aviation, or technical scheduling.
Why Time Zone Abbreviations Can Be Confusing
Abbreviations such as EST, CST, IST, BST, and PST are convenient, but they can sometimes be ambiguous.
For example, IANA notes that CST may refer to a time six hours behind UTC in North America but can also refer to a time eight hours ahead of UTC in China. Because abbreviations are not necessarily unique, IANA recommends geographic time-zone identifiers when greater precision is required.
The abbreviation IST can also be interpreted differently depending on context.
For international scheduling, choosing a city such as Chicago, Shanghai, Dublin, Jerusalem, or Kolkata is therefore clearer than relying on an abbreviation alone.
Convert Time Zones for International Meetings
One of the most common reasons to use a world time converter is international meeting planning.
If team members are spread across different countries, selecting a meeting time based only on your own clock can result in calls being scheduled very early in the morning or late at night for someone else.
Set your location as the base time zone, enter the proposed meeting time, and add each participant’s location. You can then see the corresponding local time for everyone before sending the invitation.
CurrentDateTime also lets you work with the selected conversion for scheduling purposes, making it easier to move from time comparison to calendar planning.
Time Zone Converter for Travel
Time-zone conversion is also useful before and during international travel.
A flight may depart on one date and arrive on another even when the actual journey takes far fewer than 24 hours. This happens because departure and destination cities use different local times.
A converter can help you understand arrival times, hotel check-in schedules, airport transfers, tour bookings, calls home, virtual meetings while traveling, and events taking place in your destination.
It is especially useful for journeys that cross the International Date Line, where the local calendar date can change significantly.
Convert Past and Future Dates
Time zones should always be calculated in relation to a specific date.
Governments can change time-zone boundaries, UTC offsets, and daylight saving policies. The IANA database is updated periodically to reflect these changes.
That means today’s UTC offset should not automatically be applied to a date many years in the past or future.
When converting a historical or future time, enter the actual date into the converter so the appropriate available time-zone rules can be applied.
12-Hour and 24-Hour Time Formats
Depending on your preference, you may find 12-hour time or 24-hour time easier to read.
The 12-hour format uses AM and PM, such as 9:30 AM or 7:45 PM.
The 24-hour format runs from 00:00 to 23:59, making times such as 09:30 and 19:45 unambiguous. It is commonly used internationally and can be especially convenient when comparing schedules across several regions.
Use the available format control to display converted times in the style that works best for you.
When Should You Use a Time Zone Converter?
Use a time zone converter whenever an event, appointment, deadline, call, journey, broadcast, market session, class, webinar, livestream, release, or other activity involves people or locations in different time zones.
It is particularly valuable when daylight saving time may affect one location but not another.
Instead of asking, “How many hours ahead is London?” it is usually safer to ask, “What time will it be in London on this specific date when it is this time in my city?”
That small difference makes international scheduling much more reliable.
Frequently Asked Questions
What is a time zone converter?
A time zone converter calculates the equivalent local time in another city or time zone. You select a date, time, and starting location, then choose the destination you want to compare.
How do I compare two time zones?
Select your first city or time zone as the base location, enter the date and time, and then add the second location. The converter will display the corresponding local time and the difference between the two zones.
How do I find the time difference between two cities?
Use the time difference calculator within the converter. Enter both locations and the tool will show whether the destination is ahead of or behind the base city for the selected date.
Does the time zone converter account for daylight saving time?
A date-aware time-zone system can apply applicable DST rules for supported geographical zones. This is important because UTC offsets can change during the year in places that observe seasonal clock changes.
Why does the time difference between two countries change?
Usually because one region observes daylight saving time while the other does not, or because their clock-change dates differ. Government changes to official time-zone rules can also affect offsets.
Is UTC the same as my local time?
Only if your location is currently using UTC+00:00. Otherwise, your local time is calculated by applying your location’s current UTC offset.
What is the difference between UTC and local time?
UTC is the international reference point. Local time is the civil time used at a particular location after its applicable UTC offset and time-zone rules are applied.
Can I convert EST to PST?
Yes. You can select Eastern and Pacific locations or zones and compare them for the exact date you need. For greater accuracy, especially around daylight saving changes, choosing cities such as New York and Los Angeles is clearer than assuming EST and PST apply year-round.
Can I convert a future time zone?
Yes. Choose the future date and time before selecting your locations. This is useful for international meetings, travel plans, webinars, deadlines, launches, and events scheduled weeks or months ahead.
Can the date change when converting time zones?
Yes. A converted time can fall on the previous or next calendar day. This commonly happens when comparing locations with large UTC differences.
What is the best way to specify a time zone?
For casual use, a familiar city or common regional name may be enough. For precise technical use, geographic IANA identifiers such as America/New_York, Europe/London, and Asia/Tokyo are preferable because they represent the rules associated with a location rather than only a fixed offset.
Compare World Times Instantly
International time does not need to be complicated.
Use the Time Zone Converter & World Clock to convert local times, compare cities, check UTC offsets, calculate time differences, and coordinate plans across the world.
Select your date and time, choose a base location, add your destination, and get the corresponding local time instantly.
Whether you are planning a meeting between New York and London, converting UTC to local time, checking the time in Tokyo, coordinating a call between India and the United States, or simply wondering what time it is somewhere else, CurrentDateTime’s Time Zone Converter gives you one place to compare world time clearly and efficiently.