Time Zone Converter
Free time zone converter with live world clocks
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
Scheduling a call across cities? Find overlapping working hours.
About this tool
A timezone converter answers one practical question: if an event is at a given local time in one place, what clock time is that for someone somewhere else. You pick a source timezone and datetime, choose a destination timezone, and get the equivalent local time with daylight-saving rules applied for that date. That removes the usual meeting mistakes - inviting someone an hour early after a DST change, or reading a flight arrival in the wrong city. It is for exact conversion of one moment, not a live world clock of many cities at once. Once you have the mapped time, paste it into calendar invites, travel plans or support handoffs so every side shares the same instant.
How to use this tool
- Pick source timezone and datetimeEnter exact original local time for event reference.
- Select destination timezoneChoose target region/person timezone for conversion.
- Run conversionCompute equivalent local time with DST handling.
- Share converted scheduleUse mapped times in invites, emails, and runbooks.
Converting times across time zones correctly
Always convert with the date, not just the time: daylight saving starts and ends on different dates in different countries, so the gap between two cities can change for a few weeks each year. New York and London are usually five hours apart, but only four for a short time in spring and autumn.
For flights, convert the arrival time from the departure city’s zone to the destination’s - airlines always print local times.
Key features
- Eliminates timezone confusion for global coordination.
- Handles DST rules automatically for selected dates.
- Useful for meetings, travel, and support operations.
- Improves communication clarity across remote teams.
Common uses
- Converting webinar time for international attendees.
- Planning cross-region project handoff calls.
- Mapping flight/event schedules across time zones.
- Coordinating follow-the-sun support rotations.
Tips for better results
- Always include date with time when converting.
- Double-check transitions near DST switch weeks.
- Send invite in recipient local timezone when possible.
- Use explicit timezone abbreviations in communications.
Mistakes to avoid
- Assuming fixed hour offset year-round.
- Converting time without matching the correct date.
- Mixing city aliases with different DST rules.
- Publishing schedules without timezone labels.
Available options
- Source timezone
- Destination timezone
- Date and time
Frequently asked questions
Yes - the conversion reflects whether either time zone is currently observing daylight saving time, based on the actual date you're converting for.
World Clock shows the current live time across multiple locations at a glance. This tool is for converting a SPECIFIC time (like "3pm on March 5th") from one zone into its equivalent in another zone.
Yes - specify the exact date along with the time, since daylight saving rules can differ depending on the time of year, affecting the correct conversion.
Airlines print departure and arrival times in each airport's local time. Convert the departure time to your destination zone and add the flight duration to check the arrival is consistent.
EST is US Eastern Standard Time (UTC-5) and EDT its summer time (UTC-4); CET is Central European Time (UTC+1) and CEST its summer time (UTC+2). Some abbreviations are ambiguous, so city names are safer.
Send calendar invites rather than typed times, since they convert automatically, and double-check meetings in the weeks around daylight-saving changes, when offsets shift.