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Time Zone Converter

Convert times between world time zones, world clock with major cities, international meeting planner. 100% free.

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World clock
Local time in 400+ cities
Instant conversion
Convert between any time zone
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Meeting planner
Find the perfect time for everyone

How to Use the Time Zone Converter

Our time zone converter lets you instantly and accurately convert times between any city in the world. It supports over 400 cities and all 38 existing time zones, including those with half-hour offsets like India (UTC+5:30) and Central Australia (UTC+9:30).

Time conversion: Select your source and destination cities, enter the time, and get instant conversion. The system automatically accounts for daylight saving time (DST), so results are always accurate regardless of the time of year.

World clock: Add cities you care about and monitor local time in real-time. Perfect for those working with international teams, clients abroad, or following events in different time zones. The clock updates automatically every second.

Meeting planner: Add all participants' time zones and automatically find the best meeting time. The system highlights business hours (9 AM-6 PM) in green, acceptable hours in yellow, and off-hours in red. Ideal for globally distributed teams.

This tool is completely free, runs entirely in your browser, and requires no sign-up. Calculations use the browser's native Intl.DateTimeFormat API, which guarantees absolute accuracy, including automatic daylight saving time handling for every single zone.

Frequently Asked Questions

How many time zones are there in the world? +
There are 38 time zones worldwide, not 24 as commonly believed. Some countries use half-hour offsets (India UTC+5:30) or three-quarter-hour offsets (Nepal UTC+5:45). Russia alone spans 11 time zones.
What is daylight saving time and which countries use it? +
Daylight saving time (DST) shifts clocks forward one hour during summer. In Europe, clocks change the last Sunday of March and October. The US changes the second Sunday of March and first Sunday of November. Most tropical countries don't observe DST.
What is UTC and how does it differ from GMT? +
UTC (Coordinated Universal Time) is the global time standard based on atomic clocks. GMT (Greenwich Mean Time) is the time zone at Greenwich. In practice they show the same time, but UTC is the scientific standard used in aviation and computing.
How do I plan a meeting across time zones? +
Identify all participants' time zones and find a common window during business hours (9 AM-6 PM). Use our meeting planner: add cities and view the green zones to find the best time for everyone.
Does the US have multiple time zones? +
Yes, the contiguous US spans 4 time zones: Eastern (UTC-5), Central (UTC-6), Mountain (UTC-7), and Pacific (UTC-8). Including Alaska and Hawaii, the US covers 6 time zones.
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