Time Zone Converter
Plan international meetings without the headache.
Meeting Planner
Visualize time overlap across cities
New York
London
Tokyo
Explore Related Time Tools
Bridging the World's Clocks
In a globally connected world, coordinating across time zones is a daily challenge. Whether you're scheduling a call with colleagues in Tokyo, a client in London, or family in Sydney, knowing the right time is essential.
Our Time Zone Converter goes beyond simple conversions. The visual meeting planner lets you slide through the hours and instantly see how time shifts across multiple cities—highlighting business hours so you can find the perfect meeting slot.
Why Use a Meeting Planner?
Scheduling a call between New York, London, and Tokyo is a math problem you shouldn't have to solve in your head. A standard "World Clock" tells you what time it is now—but a Meeting Planner lets you look forward.
By using the slider, you can instantly spot that golden window where it's 9 AM in New York and 2 PM in London—before it gets too late in Tokyo.
Pro Tips
- Look for the Green: We highlight business hours (9 AM - 5 PM) in green to make finding slots easier.
- Avoid the Grey: Night hours are greyed out. Unless it's an emergency, try to avoid scheduling in these zones.
- Local Time Aware: We automatically detect your local time zone to start.
Common Time Zone Offsets
Reference table for frequently used time zones (standard time, DST may add +1 hour):
London (winter), Lisbon, Reykjavik
New York, Toronto, Miami
Los Angeles, San Francisco, Seattle
Mumbai, Delhi, Bangalore
Tokyo, Osaka, Seoul (KST)
Sydney, Melbourne, Brisbane
✈️ The Traveler's Rule of Thumb
When traveling, give yourself one day per hour of time difference to fully adjust to jet lag. Flying from New York (EST) to Tokyo (JST)—a 14-hour difference—means a full recovery can take up to two weeks.
For shorter trips, many travelers stay on their "home" time zone to avoid the adjustment period entirely.
Frequently Asked Questions
What is a Time Zone?
A time zone is a region of the Earth that observes a uniform standard time. The world is divided into 24 primary time zones, each roughly 15° of longitude wide. Time zones are typically expressed as an offset from UTC (Coordinated Universal Time), e.g., UTC+5:30 for India Standard Time.
What is UTC?
UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. It replaced GMT (Greenwich Mean Time) as the international standard. UTC doesn't observe daylight saving time—it remains constant year-round, making it ideal for scheduling global events.
What is Daylight Saving Time (DST)?
Daylight Saving Time (DST) is the practice of setting clocks forward by one hour during warmer months to extend evening daylight. Not all countries observe DST. The start and end dates vary by country, creating confusion for international scheduling. Our tool automatically accounts for DST.
How do I find the best meeting time across time zones?
Use our visual time slider to find the overlap of business hours (9 AM - 5 PM) across multiple cities. Aim for a time slot that falls within green-highlighted hours for all participants. For extreme time differences (e.g., US to Asia), consider rotating meeting times to share the inconvenience.
What is the International Date Line?
The International Date Line (IDL) is an imaginary line running from North to South pole through the Pacific Ocean at roughly 180° longitude. When you cross it westward, you add a day; eastward, you subtract a day. It's why a flight from the US to Australia might 'arrive before it departed'.
What is the difference between EST and EDT?
EST (Eastern Standard Time) is UTC-5, used in winter. EDT (Eastern Daylight Time) is UTC-4, used in summer during Daylight Saving Time. Many people mistakenly use 'EST' year-round, but the correct abbreviation changes with the seasons. The same applies to PST/PDT, CST/CDT, etc.
Why do some time zones have 30 or 45-minute offsets?
While most time zones follow whole-hour offsets from UTC, some regions chose offsets like UTC+5:30 (India), UTC+5:45 (Nepal), or UTC+9:30 (Central Australia) to better align noon with solar noon in their region, or for political/historical reasons.
How do I convert military time (24-hour) to 12-hour format?
For hours 00:00-11:59, it's the same as 12:00 AM - 11:59 AM. For 12:00-23:59, subtract 12 and add PM. Examples: 14:00 = 2:00 PM, 00:00 = 12:00 AM (midnight), 12:00 = 12:00 PM (noon), 23:30 = 11:30 PM.
What is Zulu Time?
Zulu time is simply another name for UTC. The 'Z' suffix in timestamps (e.g., 2024-01-15T14:30:00Z) stands for 'Zulu' in the NATO phonetic alphabet. It's commonly used in aviation, military, and computing to avoid ambiguity.
How do I schedule a meeting for participants in different countries?
- Add all participants' cities to our converter. 2) Use the slider to find a time that falls within business hours (green zone) for as many people as possible. 3) When sending the invite, always specify the time zone (e.g., '3 PM EST' or '15:00 UTC'). 4) Use calendar apps that auto-convert times.