timezones.now — Frequently Asked Questions

Yes — free, no signup, no download.

It depends what you count. There are around 38 distinct UTC offsets in use and several hundred IANA zone identifiers, because zones track places and their histories rather than lines of longitude.

UTC is the modern atomic standard and GMT is the older astronomical term for the same reference. For everyday scheduling they are interchangeable; for technical work UTC is the correct term.

Yes, everywhere on the site — all times come from your browser's current time-zone data rather than fixed offsets.

No. Every clock and conversion runs locally in your browser.

Several hundred — the full IANA set your browser ships with, which is far more than the 24 people expect, because zones follow political borders rather than lines of longitude.

Yes. Every time shown comes from your browser's current time-zone data, so zones observing daylight saving already show the shifted time.

Yes — type an offset such as +05:30 and the list filters to zones currently at that offset.

Yes. Conversions use your browser's current time-zone rules, so a time in July and the same time in January convert correctly even when only one side shifts.

Yes, and you should — daylight saving means the gap between two zones is not constant, so converting for the actual meeting date matters.

Because a large enough offset difference pushes the time past midnight. The converter shows the resulting date so this is never a surprise.

Yes — every city updates continuously from your device's clock and your browser's time-zone data.

Some regions use half-hour or quarter-hour offsets. India runs at UTC+05:30 and Nepal at UTC+05:45 — see the guide on half-hour zones.

UTC+14:00, used by the Line Islands in Kiribati, which are the first inhabited places to enter each new day.

No. Several are 30 minutes off, such as India at UTC+05:30, and a few are 45 minutes off, including Nepal at UTC+05:45 and the Chatham Islands at UTC+12:45.

The listed offsets are standard-time offsets. Places currently observing daylight saving are effectively one row higher for that part of the year.

It depends: Indian Standard Time (UTC+05:30), Irish Standard Time (UTC+01:00) or Israel Standard Time (UTC+02:00). Context is the only way to tell, which is exactly the problem.

No. The Eastern zone uses EST in winter and EDT during daylight saving. ET is the safe year-round label.

Because they are not unique and no standards body governs them. Two systems can read the same abbreviation as different offsets, which quietly corrupts data.