World Time Zone Converter
Compare city times, find working-hour overlap, and plan meetings across DST-aware time zones.
Accepts many formats. If no time zone is included, the top city is used.
US Pacific
—±0:00United States · America/Los_Angeles
US East
—±0:00United States · America/New_York
My Time
—±0:00Local time · UTC
Minute-accurate tactile scrub · arrows jump 15 minutes · haptics when available
How to Use the World Time Zone Converter
- 1
Enter a time in the convert box using formats like Jul 29, 2026 - 19:49 UTC, ISO timestamps, or just 19:49. If no time zone is included, the top city is used.
- 2
Add cities from the searchable list. ToolGenie shows the local time, date, zone abbreviation, and offset for each one.
- 3
Drag the timeline at the bottom for minute-level control, or use the arrows to jump through time in tactile 15-minute steps.
- 4
Check the availability dots to find green working-hour overlap and avoid red off-hours.
- 5
Sort and customize cities by dragging the reorder handle, then set a nickname, accent color, or preferred availability window. Press Now to reset the timeline.
- 6
Share the board with Copy link (restores cities, time, and format), Download image / Copy image for a branded PNG, Share on supported devices, or Copy times for a plain-text meeting summary you can paste into chat or email.
Compare Multiple Cities and Plan Global Meetings
ToolGenie's free world time zone converter combines a live world clock, a time difference calculator, and a visual time zone meeting planner. Paste a time like Jul 29, 2026 - 19:49 UTC into the convert box, add multiple cities, scrub through the day, and compare the same instant everywhere without doing mental UTC calculations.
The converter uses named IANA time zones, so daylight saving time changes and date rollovers are handled automatically. It also supports half-hour and 45-minute zones, making conversions for India, Nepal, Newfoundland, Adelaide, and the Chatham Islands accurate.
Your city list, accent colors, and working hours are saved only in your browser. There is no account, upload, or server-side calendar access. For related planning, try the epoch / Unix timestamp converter, date difference calculator, timer and stopwatch, or Pomodoro timer.
City-to-City Time Differences and Working-Hour Overlap
Converting one moment is the easy part. The harder question is how many hours two teams can actually share. The table below is worked out for a plain 09:00–18:00 local working day on each side, using standard (non-summer) offsets. Add the same cities to the board above and drag the timeline to check the exact date you care about.
| City pair | Standard-time difference | Shared 09:00–18:00 hours | What that means in practice |
|---|---|---|---|
| Los Angeles ↔ New York | 3 hours | 6 hours (09:00–15:00 in Los Angeles) | The easiest US pair. Anything started before 15:00 Pacific still lands inside the New York working day. |
| New York ↔ London | 5 hours | 4 hours (09:00–13:00 in New York) | London afternoons are the entire shared window, so book before lunch in New York. |
| London ↔ Bengaluru | 5 hours 30 minutes | 3.5 hours (09:00–12:30 in London) | The overlap grows to about 4.5 hours in summer, because London moves to BST and India never shifts. |
| London ↔ Singapore | 8 hours | 1 hour (09:00–10:00 in London) | Only the very start of the London day works. Singapore never changes its clocks, so this window is stable. |
| San Francisco ↔ Berlin | 9 hours | None on a strict 09:00–18:00 day | 08:00 in San Francisco is 17:00 in Berlin, so one side has to step outside the standard day. |
| Sydney ↔ London | 11 hours in January, 9 hours in July | None in January, about 1 hour in July | Australia runs summer time in the opposite half of the year, so this gap changes twice annually. |
Two habits remove most of the pain. First, pick one anchor city and always quote the meeting in that city plus UTC, so nobody has to guess whose morning you meant. Second, set each city’s availability window on the board to the hours the team really works. A Madrid team that starts at 09:30 and a Bengaluru team that finishes at 19:00 produce a very different green band than a textbook 9-to-5, and the board only helps if it matches reality.
How to Find the Best Meeting Time Across Time Zones
Add every participant's city, then scrub the shared timeline (or paste a proposed time) until you see the most green and yellow availability dots. Green means the time sits inside that city's preferred working hours; yellow is an early/late edge; red is outside the window.
Rotate who takes early or late calls, check the calendar date badge when a city rolls into tomorrow, and re-check recurring meetings near daylight saving transitions. Prefer city names over ambiguous abbreviations when you share the final time.
A worked three-way example. San Francisco, London, and Bengaluru share no hour that falls inside 09:00–18:00 for all three. The least bad slot is 08:00 in San Francisco, which is 16:00 in London and 21:30 in Bengaluru in winter — or 08:30 in San Francisco, 16:30 in London, and 21:00 in Bengaluru once British Summer Time starts. Someone always pays for a spread that wide, so make the cost visible: rotate the slot each quarter, keep the call to 30 minutes, and record it for whoever had to skip.
How This Converter Handles Daylight Saving Time
Every city on the board is stored as a named IANA time zone such as America/New_York or Australia/Sydney — never as a frozen offset. The offset is recalculated for the exact date you enter, so the same recurring meeting converts differently in July and in December, and both answers are right.
| Region | Clocks go forward in 2026 | Clocks go back in 2026 |
|---|---|---|
| United States and Canada | Sunday 8 March, 02:00 local | Sunday 1 November, 02:00 local |
| United Kingdom and European Union | Sunday 29 March, 01:00 UTC | Sunday 25 October, 01:00 UTC |
| South-east Australia (NSW, VIC, SA, TAS, ACT) | Sunday 4 October, 02:00 local | Sunday 5 April, 03:00 local |
| India, China, Japan, Singapore, UAE, most of Africa | No change — these zones never use summer time | No change — these zones never use summer time |
The three-week trap. North America and Europe do not switch on the same weekend. From 8 to 29 March 2026, New York is already on EDT while London is still on GMT, so the pair sits 4 hours apart instead of the usual 5. The mirror image runs from 25 October to 1 November 2026. A recurring call that looks stable all year quietly moves twice inside those windows, which is the single most common cause of a missed international meeting.
Times that do not exist, and times that happen twice. When clocks spring forward an hour is skipped: 02:30 on 8 March 2026 never happens in New York. Type it and the converter rolls it forward to the next real instant, 03:30 EDT. When clocks fall back an hour repeats: 01:30 on 1 November 2026 happens twice in New York, and the converter resolves it to the first occurrence, still EDT at UTC−4. If you need the second one, enter the time in UTC or with an explicit offset.
The hemispheres are out of phase. While Europe is on summer time, Australia is on standard time, and the reverse. That is why Sydney is 11 hours ahead of London in January but only 9 hours ahead in July. Never store an Australia–Europe difference as a constant. You can watch any of this happen: type a transition date into the convert box and step across it with the arrow buttons.
UTC vs GMT vs Local Offsets (and Why Abbreviations Lie)
UTC is the modern civil time standard used in computing. GMT is a timezone historically tied to Greenwich. For everyday scheduling they often match, but abbreviations like CST or IST can mean different places. Prefer city names or IANA zones (for example America/Chicago, Asia/Kolkata) when converting.
Need a raw Unix timestamp instead of city clocks? Use the Epoch Converter.
What the Availability Colors Mean
The selected time is inside that city's preferred working hours.
The time is near the start or end of the availability window.
The selected time falls outside that city's preferred hours.
Limitations and Accuracy Notes
- It uses your browser’s time zone database. Governments change time zone rules with very little notice. A browser or operating system left un-updated for a long time can carry stale rules, so update both before trusting an unusual zone.
- Far-future dates are predictions, not facts. Any conversion more than a year out assumes today’s rules still apply. Re-check it closer to the date before booking a flight or signing a contract around it.
- Historical dates are approximate. Time zone data before roughly 1970 is incomplete for many regions. This is a scheduling tool, not a source for historical research.
- Abbreviations stay ambiguous. CST can mean Chicago, Havana, or Beijing; IST can mean India, Ireland, or Israel. The converter has to pick one reading, so type a city or an IANA name whenever the answer matters.
- Whole-minute accuracy only. Leap seconds are not modelled and seconds are not displayed. That is correct for scheduling and wrong for anything that needs a precision time source.
- Nothing leaves your browser. Cities, nicknames, colours, and availability windows are saved in local storage only. There is no account and no calendar integration, so the tool cannot read your existing meetings or send invitations. Clearing site data resets the board. Copy link encodes the board state in the URL, so a long city list makes a long link.
World Time Zone Converter FAQ
How do I convert a specific date and time across time zones?
Type a date and time into the convert box at the top of the tool, then press Convert time or Enter. Every city updates to that same instant, so you can see the local time, date, offset, and availability for each one. Example: “Jul 29, 2026 - 19:49 UTC”.
What date and time formats does the converter accept?
Many common formats work, including “Jul 29, 2026 - 19:49 UTC”, “2026-07-29 19:49”, “29 Jul 2026 7:49 PM”, “7:49 PM EST”, ISO timestamps like “2026-07-29T19:49:00Z”, Unix epoch values, and time-only inputs such as “19:49”. You can also include IANA zones (America/New_York), abbreviations (UTC, EST, PST, IST, JST), or offsets (GMT+5:30, +05:30).
What happens if I enter a time without a time zone?
If no time zone is mentioned, ToolGenie interprets the value in the top city’s time zone — the first city in your list. Reorder cities to change which zone is used as the default for zone-less inputs.
How do I compare time zones between multiple cities?
Add the cities you want to compare, enter a time in the convert box or drag the shared timeline, and use the arrow buttons for 15-minute steps. Every city updates to the same instant, so local times, dates, UTC offsets, and working-hour availability stay aligned. A Next day +1 or Previous day −1 badge warns when a city is on a different calendar day from My Time.
How do I find the best meeting time across time zones?
Enter a proposed meeting time in the convert box, or scrub through the timeline, and look for a moment when the cities you need are green or yellow. Green means the selected time is inside that city's preferred working hours, while yellow marks an early or late edge that may still be workable.
What do the green, yellow, and red availability dots mean?
Green means the selected time is within the city's configured availability. Yellow means it is within one hour of the start or end of that window. Red means it falls outside the preferred hours.
Does the time zone converter adjust for daylight saving time?
Yes. ToolGenie uses IANA time zone data supplied by your browser, so daylight saving time and seasonal UTC offset changes are applied for the selected date automatically — including dates you type into the convert box.
Why is my time zone conversion off by one hour?
Usually daylight saving time changed on one side of the pair, or an ambiguous abbreviation (like CST or IST) was read differently than you expected. North America and Europe do not switch on the same weekend: between 8 and 29 March 2026, and again between 25 October and 1 November 2026, New York and London are 4 hours apart instead of 5. Prefer city names or IANA zones, and recheck any recurring meeting near a transition date.
What is the difference between UTC and GMT?
UTC is the modern civil time standard; GMT is a time zone historically tied to Greenwich. For everyday conversion they often match, but UTC is the preferred reference in computing. This tool displays offsets against the selected zones rather than relying on ambiguous labels alone.
Should I use city names or abbreviations like CST/IST?
Prefer city names or IANA zones (for example America/Chicago or Asia/Kolkata). Abbreviations such as CST and IST are ambiguous across regions and are a common source of one-hour or half-day mistakes.
Can I add, remove, and customize cities?
Yes. Use Add city to append a city to the list, drag the handle to reorder cities, and open a city's settings to change its nickname, accent color, or availability hours. Every city, including My Time, can be removed; My Time returns when the page is refreshed. The top city also becomes the default time zone for inputs that do not include one.
Can I compare future or past dates?
Yes. Paste or type any date into the convert box, drag the timeline for minute-level control, or use the left and right arrows to move in 15-minute steps. Press Now at any time to return to the current moment.
Does the converter support half-hour and 45-minute time zones?
Yes. The city list includes zones such as India, Nepal, Newfoundland, and the Chatham Islands, so half-hour and 45-minute offsets are displayed and converted accurately. Offset inputs like GMT+5:30 are supported in the convert box as well.
Can I share my world clock or meeting times with a link?
Yes. Use Copy link to copy a shareable URL that restores your selected cities, reference time, and 12/24-hour format. Recipients open the same comparison instantly. Shared query links canonicalize back to the clean tool URL for search engines.
Can I download or copy the world clock as an image?
Yes. Use Download image or Copy image to export your current city board as a PNG (with subtle ToolGenie branding). On supported phones, Share can open the native share sheet with the link and image when available.
Is this world time zone converter free and private?
Yes. The converter is free, requires no sign-up, and runs entirely in your browser. City comparisons are not uploaded to ToolGenie servers. Share links encode only the non-secret board state (cities and time) in the URL.
Tips for Scheduling International Meetings
- Prefer green overlap and rotate early or late calls fairly.
- Paste the proposed time into the convert box to check every city at once.
- Check the displayed date as well as the local time.
- Recheck recurring meetings near DST transition dates.
- Include a time zone in the convert box, or put that city at the top of the list.
- Customize real team availability instead of assuming 9–5.
- Embed a live converter on your intranet or handbook with free ToolGenie widgets.
- Use 24-hour time when working across many regions.
- Send a Copy link URL or Download image PNG so teammates reopen the same city board without rebuilding it.