World Timezone Converter & Meeting Planner
Drag the time slider to coordinate across international timezones, find common working hours, and copy meeting invites in one click.
Why is Timezone Coordination Difficult?
Scheduling global meetings is notoriously error-prone due to daylight saving time rules that change arbitrarily based on jurisdiction. Our visual timezone converter allows you to align sliders to immediately see the overlap between business hours in Tokyo, London, and New York, ensuring you never accidentally schedule a 3 AM meeting.
Frequently Asked Questions
Why do meeting times sometimes shift by an extra hour unexpectedly?
This is almost always caused by Daylight Saving Time — since not all countries (or even all regions within a country) observe DST on the same dates, the UTC offset between two cities can change during part of the year.
What's the difference between GMT and UTC?
For practical purposes they're the same time, but UTC is the precise scientific time standard maintained by atomic clocks, while GMT is a time zone that historically was defined by mean solar time at Greenwich — GMT is not adjusted for DST, while local British time (BST) is.
How do I find a good meeting time across multiple time zones?
Overlap the standard working-hours window (e.g. 9am-6pm local) for each city on a shared timeline — a time that falls in every participant's normal working hours simultaneously is your best option, which is exactly what a visual timezone overlap tool helps you spot quickly.
Does this tool account for regions that don't observe Daylight Saving Time?
Yes — time zone conversions rely on the IANA time zone database, which tracks each region's specific DST rules, including regions like most of Arizona in the US or all of India that don't observe DST at all.
⚡ Related Developer Tools
View All 30+ Tools →JWT Decoder
Decode JSON Web Tokens securely in your browser with header/payload highlighting and expiration check.
Hash Generator
SHA-256, SHA-512, and SHA-1 cryptographic hashing using browser SubtleCrypto API.
Password Generator
Cryptographic high-entropy passwords, API tokens, and secure passphrases.