Timezone Converter
Convert times between any timezones with meeting planner table for global team coordination
Interactive tool
Source time
Target timezones
What is a Timezone Converter?
A timezone converter translates a single moment between multiple timezones at once and displays a meeting planner table that highlights working hours across cities. Built on IANA timezone data so daylight saving rules are correct.
How to Use This Timezone Converter
- 1Pick a date and time and the source timezone
- 2Add target timezones for the cities you care about
- 3Read the converted local time in each target zone
- 4Use the meeting planner row to find overlapping working hours
- 5Click Now to reset to the current moment
Key features
Multi-Zone Conversion
Convert one source moment into any number of target timezones at the same time
Meeting Planner Grid
Color-coded grid highlights 9 to 18 local hours, making it easy to spot overlapping working hours
IANA Timezone Data
Uses canonical IANA names like America/New_York, so daylight saving rules are correct year-round
Browser Timezone Auto-Detected
Your local timezone is detected and added to the picker automatically
Live Updates
Conversion and the planner table update instantly as you change time or zones
Now Button
One click resets to the current moment in your timezone
Day-Crossing Visibility
Cells in the planner show short weekday labels via tooltip so you can see when meetings cross midnight
100% Private
Conversion runs in your browser. Nothing is uploaded
Why Use a Timezone Converter?
Coordinating meetings, deployments, and customer support across timezones is error prone. Mental math fails on daylight saving boundaries, and "EST" can mean two different things depending on the season. A converter that uses IANA data and shows working hours visually removes the guesswork.
Common use cases
- Scheduling cross-team meetings across continents
- Planning global product launches with synchronized announcements
- Coordinating on-call schedules across regions
- Verifying maintenance windows in customer timezones
- Translating webinar start times for international audiences
- Aligning sales calls with prospect business hours
- Planning travel itineraries across timezones
- Setting deadlines for distributed teams
IANA Timezones vs Abbreviations
Abbreviations like EST or BST are ambiguous. IANA names like America/New_York or Europe/London are canonical: they automatically use the correct offset including DST. Always prefer IANA names when scheduling.
Reading the Meeting Planner
The planner shows hours offset from your source time. Highlighted cells are 9-to-18 local hours, the typical work day. Lining up highlighted cells across rows finds windows where everyone is available.
Tips & best practices
Pick the source carefully
The source zone is the one your input time refers to. Choose your own timezone unless the input represents a moment in another zone
Use Now for live planning
Click Now to anchor the planner to right now and explore what time it is around the world
Watch the offset column
The offset (like +05:30 or -04:00) tells you how far each zone sits from UTC at that exact moment, accounting for DST
Add only zones you need
A focused list of 3 to 5 zones is easier to read than 20. Add and remove zones as you go
Hover for full date
Cells in the planner have a tooltip with the full weekday and time, useful for moments that cross midnight
Privacy & security
This timezone converter runs entirely in your web browser using date-fns-tz and IANA timezone data. Inputs are never uploaded to any server, stored anywhere, or transmitted. All conversion happens locally on your device.
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Frequently Asked Questions
Why use IANA names instead of abbreviations like EST or PST?
Abbreviations are ambiguous (CST can mean Central Standard Time, China Standard Time, or Cuba Standard Time). IANA names like America/New_York are canonical and apply daylight saving rules correctly.
Does it handle daylight saving time automatically?
Yes. The converter uses date-fns-tz with IANA timezone data, so DST transitions are applied correctly for any date in the past or future.
How do I find a good meeting time across regions?
Look at the meeting planner table and find a column where the highlighted (9 to 18) local hours overlap across rows. That column represents a time when most or all participants are in working hours.
What is the source timezone for?
The source timezone is what your typed time refers to. If you enter 14:00 with source America/New_York, the tool treats that as 2pm in New York and converts to other zones from there.
Can I add cities not in the dropdown?
The dropdown lists common timezones. Other IANA names exist (like Asia/Bangkok) and would need to be added to the source list. For now, pick the closest available zone.
Is my data sent to any server?
No. All conversion runs entirely in your browser. Inputs are never uploaded, stored, or transmitted to any server.