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Timezone Meeting Planner & World Clock

Free meeting planner for distributed teams. Find overlap windows across 38 time zones, schedule calls, convert times, and export to calendar.

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What This World Clock and Meeting Planner Does

This tool combines a live world clock for 38 time zones, a meeting time planner with a drag-to-explore slider, and a precise UTC time zone converter — all in one page, free, no signup, no ads. It is designed for distributed teams, remote workers, international project managers, and anyone scheduling calls across multiple regions.

Find the Best Meeting Time Across Time Zones

The meeting planner solves the most common distributed-team problem: finding a time that works for everyone when participants are spread across continents. Drag the slider to test a candidate time, and the row for each city instantly recolors — green where the local time is normal business hours, yellow where it is early morning or late evening, and gray where it would be the middle of the night. You can scan dozens of zones at once and see overlap windows immediately, instead of doing arithmetic in your head for each participant.

For teams that span very wide ranges — say San Francisco, London, and Singapore — there is often no time that is convenient for everyone. The planner makes the unavoidable trade-off visible so you can pick the least-bad slot and rotate over time.

Convert Between Time Zones

The dedicated converter handles point-in-time conversions: "what is 3pm New York on Thursday in Tokyo?" Pick the source zone, date, and time, then pick the destination zone. The result updates as you change any field, and the tool accounts for daylight saving time transitions automatically.

The converter supports half-hour zones (IST, Newfoundland), 45-minute zones (Nepal, Chatham Islands), and the standard UTC offsets. You can also use it to translate ambiguous abbreviations — "CST" can mean Central Standard Time (UTC−6) in North America or China Standard Time (UTC+8); selecting the specific city removes the ambiguity.

Live World Clocks for 38 Time Zones

The world clock view shows current local time for major cities in every populated region: New York, Los Angeles, Chicago, Denver, Anchorage, Honolulu, Toronto, Mexico City, São Paulo, Buenos Aires, London, Dublin, Paris, Berlin, Madrid, Rome, Amsterdam, Stockholm, Moscow, Istanbul, Dubai, Riyadh, Tehran, Mumbai, Karachi, Dhaka, Bangkok, Jakarta, Singapore, Hong Kong, Shanghai, Tokyo, Seoul, Sydney, Melbourne, Perth, Auckland, plus UTC reference. Each clock indicates whether the location is currently in normal business hours so you can tell at a glance whether to message someone now or wait.

Common Use Cases

  • Distributed engineering teams scheduling daily stand-ups, sprint planning, or incident response calls across 3+ continents.
  • Sales teams booking demos with international prospects without misquoting a time.
  • Customer success and support coordinating handoffs between regional follow-the-sun coverage.
  • Conference and event planners finding a session time that maximizes live attendance across target regions.
  • Remote workers coordinating with coworkers, family, or friends in other time zones.
  • Job seekers confirming the time zone of an interview invite before showing up at the wrong hour.

Frequently Confused Time Zone Abbreviations

CST is ambiguous (Central Standard Time North America vs. China Standard Time). IST means Indian Standard Time, Irish Standard Time, or Israel Standard Time depending on context. AEST and AEDT are different (the latter is daylight time, one hour ahead). When sharing a meeting time, prefer either a city name ("3pm New York") or a UTC offset ("19:00 UTC") rather than ambiguous letter codes.

Daylight Saving Time Considerations

DST does not start and end on the same dates in every country. The US and Canada switch on the second Sunday in March and first Sunday in November. The EU switches on the last Sunday in March and last Sunday in October. Australia and New Zealand switch in opposite months because of the southern hemisphere. India, China, Japan, and most of Asia do not observe DST. Saudi Arabia, the UAE, and most of Africa do not observe DST. The world clock and meeting planner here account for these differences automatically — you don't need to remember them.

## What This World Clock and Meeting Planner Does This tool combines a live world clock for 38 time zones, a meeting time planner with a drag-to-explore slider, and a precise UTC time zone converter — all in one page, free, no signup, no ads. It is designed for distributed teams, remote workers, international project managers, and anyone scheduling calls across multiple regions. ## Find the Best Meeting Time Across Time Zones The meeting planner solves the most common distributed-team problem: finding a time that works for everyone when participants are spread across continents. Drag the slider to test a candidate time, and the row for each city instantly recolors — green where the local time is normal business hours, yellow where it is early morning or late evening, and gray where it would be the middle of the night. You can scan dozens of zones at once and see overlap windows immediately, instead of doing arithmetic in your head for each participant. For teams that span very wide ranges — say San Francisco, London, and Singapore — there is often no time that is convenient for everyone. The planner makes the unavoidable trade-off visible so you can pick the least-bad slot and rotate over time. ## Convert Between Time Zones The dedicated converter handles point-in-time conversions: "what is 3pm New York on Thursday in Tokyo?" Pick the source zone, date, and time, then pick the destination zone. The result updates as you change any field, and the tool accounts for daylight saving time transitions automatically. The converter supports half-hour zones (IST, Newfoundland), 45-minute zones (Nepal, Chatham Islands), and the standard UTC offsets. You can also use it to translate ambiguous abbreviations — "CST" can mean Central Standard Time (UTC−6) in North America or China Standard Time (UTC+8); selecting the specific city removes the ambiguity. ## Live World Clocks for 38 Time Zones The world clock view shows current local time for major cities in every populated region: New York, Los Angeles, Chicago, Denver, Anchorage, Honolulu, Toronto, Mexico City, São Paulo, Buenos Aires, London, Dublin, Paris, Berlin, Madrid, Rome, Amsterdam, Stockholm, Moscow, Istanbul, Dubai, Riyadh, Tehran, Mumbai, Karachi, Dhaka, Bangkok, Jakarta, Singapore, Hong Kong, Shanghai, Tokyo, Seoul, Sydney, Melbourne, Perth, Auckland, plus UTC reference. Each clock indicates whether the location is currently in normal business hours so you can tell at a glance whether to message someone now or wait. ## Common Use Cases - **Distributed engineering teams** scheduling daily stand-ups, sprint planning, or incident response calls across 3+ continents. - **Sales teams** booking demos with international prospects without misquoting a time. - **Customer success and support** coordinating handoffs between regional follow-the-sun coverage. - **Conference and event planners** finding a session time that maximizes live attendance across target regions. - **Remote workers** coordinating with coworkers, family, or friends in other time zones. - **Job seekers** confirming the time zone of an interview invite before showing up at the wrong hour. ## Frequently Confused Time Zone Abbreviations CST is ambiguous (Central Standard Time North America vs. China Standard Time). IST means Indian Standard Time, Irish Standard Time, or Israel Standard Time depending on context. AEST and AEDT are different (the latter is daylight time, one hour ahead). When sharing a meeting time, prefer either a city name ("3pm New York") or a UTC offset ("19:00 UTC") rather than ambiguous letter codes. ## Daylight Saving Time Considerations DST does not start and end on the same dates in every country. The US and Canada switch on the second Sunday in March and first Sunday in November. The EU switches on the last Sunday in March and last Sunday in October. Australia and New Zealand switch in opposite months because of the southern hemisphere. India, China, Japan, and most of Asia do not observe DST. Saudi Arabia, the UAE, and most of Africa do not observe DST. The world clock and meeting planner here account for these differences automatically — you don't need to remember them.
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Coordinating Global Teams?

Our distributed team builds applications for international users with proper timezone handling.

World Clock, Meeting Planner & Time Zone Converter

Three tools in one for distributed teams and international scheduling.

World Clocks

View live clocks for 38 time zones across 9 regions. Add cities, star favorites, filter by region, and share your setup. Each clock shows local time, UTC offset, and whether it is currently business hours.

Meeting Time Slider

Drag the slider to any time in your day and instantly see what time it is in every other zone. Color-coded rows show who is in business hours (green), early or late (yellow), or asleep (gray). A mini 24-hour bar per zone shows the business-hours window at a glance.

Time Zone Converter

Pick a source timezone, date, and time — the result auto-updates as you change any field. Defaults to your local timezone so you can quickly check what time a meeting would be for a colleague abroad.

Supported Regions

North America, Europe, Asia, Oceania, South America, Africa, Middle East, plus UTC. Covers PST, EST, CST, MST, GMT, BST, CET, IST, JST, AEST, and 28 more abbreviations.

How to Plan a Meeting Across Time Zones

  1. Add the cities for everyone on the call. Use the world clock list to pin each participant's location.
  2. Drag the meeting slider to a candidate time in any one person's day. The other zones update in real time.
  3. Watch the color bars — green means business hours for that person. Look for a slider position where every zone is green (or as close as possible).
  4. Account for DST. The clocks already do this automatically; March and November are the trickiest weeks for US/Europe overlap.
  5. Copy and share the proposed time as UTC plus each local conversion so there's no ambiguity in the invite.

Why World Clocks and a Meeting Planner Beat Manual Math

Mental time zone math is unreliable — DST rules differ by country, half-hour and 45-minute offsets exist (India: UTC+5:30, Nepal: UTC+5:45, parts of Australia: UTC+8:45), and a single fence-post error means someone joins an hour early or misses the meeting entirely. A meeting planner shows every participant's local time simultaneously so you can spot the overlap visually and avoid the back-and-forth of "wait, is that 3pm my time or yours?"

For recurring meetings across many time zones, the planner also helps you rotate the inconvenience — pick a 6am slot in one region this month, then shift the burden next month so the same team isn't always the one waking up early.

References & Citations

  1. Paul Eggert & Arthur David Olson. (2024). IANA Time Zone Database. Retrieved from https://www.iana.org/time-zones (accessed January 2025)
  2. International Organization for Standardization. (2019). ISO 8601 Date and Time Format. Retrieved from https://www.iso.org/iso-8601-date-and-time-format.html (accessed January 2025)

Note: These citations are provided for informational and educational purposes. Always verify information with the original sources and consult with qualified professionals for specific advice related to your situation.

Frequently Asked Questions

Common questions about the Timezone Meeting Planner & World Clock

Timezones divide the Earth into 24 regions with standardized local times, roughly following 15-degree longitude bands. They enable coordinated global activities while maintaining local solar alignment. Critical for: scheduling international meetings, coordinating software releases, logging events correctly, managing SLAs across regions, and avoiding business communication errors. Many countries observe DST (Daylight Saving Time), complicating calculations further.

UTC (Coordinated Universal Time) is the primary time standard used globally, based on atomic clocks. GMT (Greenwich Mean Time) is a timezone (UTC+0) tied to solar time at Greenwich, UK. While often used interchangeably, UTC is more precise. All timezones express offset from UTC (e.g., EST is UTC-5, JST is UTC+9). Always store timestamps in UTC and convert to local time for display.

Store all timestamps in UTC in databases and logs. Use timezone-aware libraries (moment-timezone, date-fns-tz, Python pytz, Java ZonedDateTime) instead of manual offsets. Never store local times without timezone context. Account for DST transitions. Use IANA timezone identifiers (America/New_York) not abbreviations (EST) which are ambiguous. Test edge cases: DST transitions, leap seconds, historical timezone changes.

DST shifts clocks forward (spring) and backward (fall) to extend evening daylight. Not all countries observe DST; those that do change on different dates. This creates scheduling complexity: a weekly meeting at "10 AM EST" will shift relative to regions without DST. Solutions: schedule in UTC, use recurring meeting tools that handle DST, or specify "floating" times that adjust with local clocks.

Identify all participants' timezones, find overlapping business hours (typically 9 AM-6 PM local). Tools like World Time Buddy help visualize overlaps. Be fair—rotate meeting times if one region always accommodates. Document meetings in UTC and local times. Send calendar invites with timezone data (ICS format handles this). Consider asynchronous collaboration for extreme time differences, reducing synchronous meeting burden.

Assuming everyone follows your DST schedule, using ambiguous abbreviations (CST could mean Central Standard Time or China Standard Time), forgetting some regions have 30/45-minute offsets (India UTC+5:30, Nepal UTC+5:45), not testing DST transition periods, hardcoding timezone logic instead of using libraries, and displaying times without timezone context. Always clarify timezone and consider using 24-hour format for clarity.

Timezones change: countries adjust offsets, DST rules evolve, regions rename zones. The IANA Time Zone Database tracks these changes. When displaying historical data, use the timezone rules that were active at that time. Modern libraries with updated IANA data handle this automatically. Regularly update timezone databases in applications—outdated data causes incorrect historical and future time conversions.

Use ISO 8601 format (2025-01-30T14:30:00Z for UTC, 2025-01-30T14:30:00-05:00 for local with offset). Always include timezone information. Consider 24-hour format to avoid AM/PM confusion. Display both local time and UTC for clarity in global contexts. In user interfaces, detect user timezone automatically but allow override. For scheduling, show times in recipient's timezone: "3 PM your time (9 PM UTC)".

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