Question 1

Why doesn't this calculator just use a fixed list of UTC offsets?

Accepted Answer

Because a fixed offset table goes stale twice a year. Most regions that observe Daylight Saving Time shift their offset by an hour on different calendar dates depending on the country, and a handful of places have changed their DST rules entirely in the last decade. This tool asks the browser's own timezone database (via the Intl API) what a given city's offset actually was on the exact date you entered, so a conversion for a date in January and the same conversion for a date in July can correctly land an hour apart for a zone that observes DST — without needing us to hand-maintain a rulebook that would eventually drift out of date.

Question 2

Why do some countries sit on a 30- or 45-minute offset instead of a whole hour?

Accepted Answer

A handful of countries chose an offset partway between the standard hourly lines to better center their time zone on the sun for the width of the country, or to align more closely with a large neighbor while keeping some daylight benefit. India's UTC+5:30 line runs roughly through the geographic middle of the country, Nepal picked UTC+5:45 partly to stand slightly apart from India's clock, and a few Australian and Pacific regions use their own 30- or 45-minute variants for similar geographic reasons. There's no technical requirement that offsets fall on the hour — it's purely a national choice.

Question 3

How do I find a meeting time that works for people in different time zones?

Accepted Answer

Set the source time and zone to a candidate start time in whichever city is hosting the call, then open the Meeting Planner panel — it shows what local hour that same instant lands on for everyone else you've added. A slot only counts as workable for a given city if it falls roughly within that city's own 9-to-5 window, so scan the panel for the widest stretch where every city shows a business-hours result rather than an early-morning or late-night one. For teams spread across more than about 10 hours of offset, expect at least one side to land outside normal hours no matter what you pick — the planner just makes that trade-off visible instead of guessing.

Time Zone Calculator

🕓 Source Time to Convert

🌐 Converted Times (click + to add zones)

🕰️ Live World Clocks (auto-updates)

Understanding Time Zones

🧭 Key Time Zone Facts

Frequently Asked Questions

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