IANA Timezone List (Searchable, 400+ Zones)

Need to look up an IANA timezone identifier (Asia/Kolkata, Pacific/Auckland)? This list has every IANA timezone, searchable by city / country / offset, with current local time displayed. Useful for picking the right TZ for an API, scheduler, or user setting.

How to use the IANA Timezone List (Searchable, 400+ Zones)

Type any keyword — city name, country, region, or UTC offset. The list filters live. Click any TZ to copy its identifier.

Why IANA identifiers beat raw offsets

A timezone is more than a UTC offset: it is a set of rules for when and whether the offset changes for daylight saving, both historically and into the future. The IANA timezone database captures that as named identifiers like Asia/Kolkata or America/New_York — an "Area/Location" pair — which is why software wants the identifier, not "+05:30" or "EST".

Storing a bare offset throws away the DST rules; storing an abbreviation is ambiguous, since IST means India, Israel, and Ireland depending on context. This searchable list gives you the canonical identifier plus the current local time in each zone, so you can pick the right value for an API, a scheduler, or a user setting.

Common use cases

  • Configuring an app or API — find the exact IANA name a library or database expects.
  • Scheduling across regions — choose the zone a cron job or reminder should follow.
  • User profile settings — populate a timezone dropdown with canonical identifiers.
  • Debugging time bugs — confirm which zone an offset actually corresponds to right now.
  • Travel and meetings — check the current local time in another city before you dial in.

Frequently asked questions

Why not just store the UTC offset instead of a timezone name?
Because the offset changes through the year. A location on +01:00 in winter may be on +02:00 in summer; only the named zone carries the daylight-saving rules needed to get future times right.

Why are abbreviations like IST or CST ambiguous?
Several zones share the same abbreviation — IST is India, Israel, and Ireland; CST is US Central, China, and Cuba. The IANA identifier is unique, which is why systems prefer it.

How often does the timezone database change?
Several times a year, as governments adjust DST or offsets. Keep your runtime or tz library updated so recent political changes are reflected.

What is the difference between <code>Etc/GMT+5</code> and a city zone?
The Etc/GMT zones are fixed offsets with no DST, and their sign is inverted (Etc/GMT+5 is actually UTC−5). City zones like America/New_York carry the real DST rules, so prefer them for anywhere people live.
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