# getAvailableZoneIds static method

Set<String> getAvailableZoneIds()

Returns a comprehensive set of all supported timezone IDs.

This includes all predefined timezone constants from this class, covering major cities and regions worldwide.

Example:

    final available = ZoneId.getAvailableZoneIds();
    print('Total supported timezones: ${available.length}');

    for (final zoneId in available) {
      print('Zone: $zoneId');
    }

## Implementation

    static Set<String> getAvailableZoneIds() => {
      // Standard zones
      UTC.id, GMT.id, Z.id,

      // North American abbreviated
      EST.id, EDT.id, CST.id, CDT.id, MST.id, MDT.id, PST.id, PDT.id,

      // European abbreviated
      BST.id, CET.id, CEST.id, EET.id, EEST.id,

      // Americas - North America
      AMERICA_NEW_YORK.id, AMERICA_LOS_ANGELES.id, AMERICA_CHICAGO.id,
      AMERICA_DENVER.id, AMERICA_PHOENIX.id, AMERICA_ANCHORAGE.id,
      AMERICA_TORONTO.id, AMERICA_VANCOUVER.id, AMERICA_MONTREAL.id,

      // Americas - Central America
      AMERICA_MEXICO_CITY.id, AMERICA_GUATEMALA.id, AMERICA_BELIZE.id,
      AMERICA_COSTA_RICA.id, AMERICA_PANAMA.id,

      // Americas - South America
      AMERICA_SAO_PAULO.id, AMERICA_ARGENTINA_BUENOS_AIRES.id, AMERICA_LIMA.id,
      AMERICA_BOGOTA.id, AMERICA_CARACAS.id, AMERICA_SANTIAGO.id, AMERICA_LA_PAZ.id,

      // Americas - Caribpod
      AMERICA_HAVANA.id, AMERICA_JAMAICA.id, AMERICA_PUERTO_RICO.id,

      // Europe - Western
      EUROPE_LONDON.id, EUROPE_DUBLIN.id, EUROPE_LISBON.id, EUROPE_REYKJAVIK.id,

      // Europe - Central
      EUROPE_PARIS.id, EUROPE_BERLIN.id, EUROPE_ROME.id, EUROPE_MADRID.id,
      EUROPE_AMSTERDAM.id, EUROPE_BRUSSELS.id, EUROPE_VIENNA.id, EUROPE_ZURICH.id,
      EUROPE_PRAGUE.id, EUROPE_WARSAW.id, EUROPE_STOCKHOLM.id, EUROPE_OSLO.id,
      EUROPE_COPENHAGEN.id,

      // Europe - Eastern
      EUROPE_MOSCOW.id, EUROPE_ISTANBUL.id, EUROPE_ATHENS.id, EUROPE_HELSINKI.id,
      EUROPE_KIEV.id, EUROPE_BUCHAREST.id,

      // Africa
      AFRICA_CAIRO.id, AFRICA_LAGOS.id, AFRICA_NAIROBI.id, AFRICA_JOHANNESBURG.id,
      AFRICA_CASABLANCA.id, AFRICA_ACCRA.id, AFRICA_ALGIERS.id, AFRICA_TUNIS.id,
      AFRICA_ADDIS_ABABA.id, AFRICA_KINSHASA.id,

      // Asia - East
      ASIA_TOKYO.id, ASIA_SHANGHAI.id, ASIA_SEOUL.id, ASIA_HONG_KONG.id, ASIA_TAIPEI.id,

      // Asia - Southeast
      ASIA_SINGAPORE.id, ASIA_MANILA.id, ASIA_BANGKOK.id, ASIA_HO_CHI_MINH.id,
      ASIA_JAKARTA.id, ASIA_KUALA_LUMPUR.id,

      // Asia - South
      ASIA_KOLKATA.id, ASIA_KARACHI.id, ASIA_DHAKA.id, ASIA_KATHMANDU.id, ASIA_COLOMBO.id,

      // Asia - Central
      ASIA_ALMATY.id, ASIA_TASHKENT.id, ASIA_YEKATERINBURG.id,

      // Asia - Western
      ASIA_DUBAI.id, ASIA_TEHRAN.id, ASIA_BAGHDAD.id, ASIA_JERUSALEM.id, ASIA_RIYADH.id,

      // Australia & New Zealand
      AUSTRALIA_SYDNEY.id, AUSTRALIA_MELBOURNE.id, AUSTRALIA_BRISBANE.id,
      AUSTRALIA_PERTH.id, AUSTRALIA_ADELAIDE.id, AUSTRALIA_DARWIN.id,
      PACIFIC_AUCKLAND.id,

      // Pacific Islands
      PACIFIC_HONOLULU.id, PACIFIC_FIJI.id, PACIFIC_GUAM.id, PACIFIC_TAHITI.id,
      PACIFIC_CHATHAM.id,

      // Antarctica
      ANTARCTICA_PALMER.id, ANTARCTICA_MCMURDO.id,
    };