A time zone reference that states the season

Why we built it

Search for "9am EST to IST" and you will get a single number. That number is right for part of the year and wrong for the rest, because the United States changes its clocks and India does not.

The answer people actually need has two parts: what the conversion is now, and what it becomes after the next clock change. So every pair page here publishes both, alongside the dates that separate them.

Everything is computed from the IANA time zone database — the same source operating systems, programming languages and airlines rely on. Nothing on this site hard-codes an offset, which means a government rule change flows through as soon as the database is updated.

What we commit to

• Offsets read from the IANA database rather than typed into a table
• Both the standard-time and daylight-saving answers on every affected page
• Clocks that run in your browser, so nothing you enter reaches our servers
• No analytics or advertising scripts before you consent
• Corrections published within a week of being confirmed
• Advertising kept entirely separate from editorial judgement

Who writes it

A small team: two writers with backgrounds in technical documentation, an editor who checks every figure, and a developer who maintains the site and the data pipeline.

The conversion pages are generated programmatically — that is the only sane way to cover several hundred combinations — but the explanations, guides and articles are written by people, and every generated figure is produced by the same IANA-backed code that runs the live converter.

How we fund the site, correct mistakes and handle your data is written out in our editorial policy and privacy policy.