{"api":"timezone","method":"Offsets, DST, and conversions are computed from the runtime's own IANA timezone database via Intl — no bundled tzdata, no upstream.","count":418,"common":["UTC","America/New_York","America/Chicago","America/Denver","America/Los_Angeles","America/Sao_Paulo","Europe/London","Europe/Paris","Europe/Berlin","Europe/Moscow","Africa/Johannesburg","Asia/Dubai","Asia/Kolkata","Asia/Singapore","Asia/Shanghai","Asia/Tokyo","Australia/Sydney","Pacific/Auckland"],"note":"Any valid IANA zone name is accepted on the paid routes, not just the common ones listed here.","basis":{"resolver":"Intl.DateTimeFormat — the Cloudflare Workers (workerd) runtime's own ICU/IANA zone table","tzdataRelease":null,"releaseSource":"not exposed — this runtime reports an empty process.versions.tz and Intl publishes no release string, so there is no version to quote. Compare rulesFingerprint instead; no release number is guessed here.","zoneCount":418,"rulesFingerprint":"tzfp1:8693f776ec3c2068","rulesFingerprintNote":"FNV-1a digest of every supported zone name plus that zone's UTC offset at six fixed instants (15 Jan and 15 Jul of 2000, 2026 and 2040). It is not an IANA release number: an identical fingerprint means the same zone rules produced both answers, and a changed one means the runtime's rules moved — including DST boundaries that shift a far-future answer."}}