🌍 Productivity Tools

Time Zone Converter

Convert a time across cities and plan meetings — daylight saving handled automatically.

UTC

GMT

Sun, Aug 2, 4:24 PM

America / New York

GMT-4

Sun, Aug 2, 12:24 PM

Europe / London

GMT+1

Sun, Aug 2, 5:24 PM

Asia / Kolkata

GMT+5:30

Sun, Aug 2, 9:54 PM

Asia / Tokyo

GMT+9

Mon, Aug 3, 1:24 AM

Overview

Time Zone Converter: one time, every city, no mental math

Coordinating across time zones is a constant source of small errors — a call booked an hour off, a deadline that lands on the wrong day, a webinar that clashes with someone's midnight. This converter takes a single date and time in any base zone and shows it instantly in as many cities as you like, with the correct UTC offset for each. Because it uses the browser's built-in time-zone database, daylight saving transitions are applied automatically for the exact date you choose.

Add the cities your team or family are in, set the time with 'Set to now' or pick any future slot, and read every local time at a glance. Everything runs in your browser, so it works offline once loaded and nothing you enter is sent anywhere.

100% freeNo sign-upHandles daylight savingMeeting planner
How to use it
  1. 1Choose your base time zone (it defaults to your device's).
  2. 2Set the date and time, or press 'Set to now' for the current moment.
  3. 3Add the cities you want to compare from the dropdown.
  4. 4Read each converted local time and its UTC offset; remove any zone with ✕.
Key features
  • Convert any date and time across unlimited cities at once
  • Automatic daylight-saving handling for the exact date selected
  • Full IANA time-zone list on supported browsers
  • UTC offset shown for every zone, so there is no ambiguity
  • 'Set to now' for instant current-time comparison
  • 100% client-side — your schedule never leaves your device

Frequently asked questions

Does it account for daylight saving time?
Yes. It uses the browser's IANA time-zone data, which knows each region's daylight-saving rules, so the offset is correct for the specific date you enter — not just today's offset.
What does the offset like GMT+5:30 mean?
It is how far ahead of (or behind) Coordinated Universal Time that zone is at the chosen moment. GMT+5:30 means 5 hours 30 minutes ahead of UTC.
Can I plan a meeting time that works for everyone?
Yes — set a candidate time in your zone, add every participant's city, and adjust until each local time is within working hours.
Is my information private?
Completely. All conversion happens in your browser using the built-in Intl API; nothing is uploaded or stored.
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Full guide

Time Zones & UTC Explained — Offsets, DST & Scheduling

How time zones, UTC offsets and daylight saving really work, and how to schedule meetings across the world without mistakes.

UTC & offsetsDaylight saving pitfallsScheduling across zones

Related Articles & Guides

BlogDate & Time Calculations: Complete Developer GuideDates and times are deceptively simple. You look at a calendar, count the boxes between two dates, and call it done. In practice, date and time arithmetic is onArticleTime Zones & UTC Explained: Offsets, DST & SchedulingHow time zones, UTC offsets and daylight saving really work — and how to schedule meetings across the world without booking a call an hour off.BlogJSON vs CSV vs YAML: Which Format Should You Use?Every developer reaches a point in a project where they have to make a decision that feels small but has lasting consequences: which data format should I use he