For a list of known timezone supported in NSTimeZone, log:
[NSTimeZone knownTimeZoneNames]The full list:
(lldb) po [NSTimeZone knownTimeZoneNames]
<__NSCFArray 0x7fba91903000>(
Africa/Abidjan,
Africa/Accra,
Africa/Addis_Ababa,
Africa/Algiers,
Africa/Asmara,
Africa/Bamako,
Africa/Bangui,
Africa/Banjul,
Africa/Bissau,
Africa/Blantyre,
Africa/Brazzaville,
Africa/Bujumbura,
Africa/Cairo,
Africa/Casablanca,
Africa/Ceuta,
Africa/Conakry,
Africa/Dakar,
Africa/Dar_es_Salaam,
Africa/Djibouti,
Africa/Douala,
Africa/El_Aaiun,
Africa/Freetown,
Africa/Gaborone,
Africa/Harare,
Africa/Johannesburg,
Africa/Juba,
Africa/Kampala,
Africa/Khartoum,
Africa/Kigali,
Africa/Kinshasa,
Africa/Lagos,
Africa/Libreville,
Africa/Lome,
Africa/Luanda,
Africa/Lubumbashi,
Africa/Lusaka,
Africa/Malabo,
Africa/Maputo,
Africa/Maseru,
Africa/Mbabane,
Africa/Mogadishu,
Africa/Monrovia,
Africa/Nairobi,
Africa/Ndjamena,
Africa/Niamey,
Africa/Nouakchott,
Africa/Ouagadougou,
Africa/Porto-Novo,
Africa/Sao_Tome,
Africa/Tripoli,
Africa/Tunis,
Africa/Windhoek,
America/Adak,
America/Anchorage,
America/Anguilla,
America/Antigua,
America/Araguaina,
America/Argentina/Buenos_Aires,
America/Argentina/Catamarca,
America/Argentina/Cordoba,
America/Argentina/Jujuy,
America/Argentina/La_Rioja,
America/Argentina/Mendoza,
America/Argentina/Rio_Gallegos,
America/Argentina/Salta,
America/Argentina/San_Juan,
America/Argentina/San_Luis,
America/Argentina/Tucuman,
America/Argentina/Ushuaia,
America/Aruba,
America/Asuncion,
America/Atikokan,
America/Bahia,
America/Bahia_Banderas,
America/Barbados,
America/Belem,
America/Belize,
America/Blanc-Sablon,
America/Boa_Vista,
America/Bogota,
America/Boise,
America/Cambridge_Bay,
America/Campo_Grande,
America/Cancun,
America/Caracas,
America/Cayenne,
America/Cayman,
America/Chicago,
America/Chihuahua,
America/Costa_Rica,
America/Creston,
America/Cuiaba,
America/Curacao,
America/Danmarkshavn,
America/Dawson,
America/Dawson_Creek,
America/Denver,
America/Detroit,
America/Dominica,
America/Edmonton,
America/Eirunepe,
America/El_Salvador,
America/Fortaleza,
America/Glace_Bay,
America/Godthab,
America/Goose_Bay,
America/Grand_Turk,
America/Grenada,
America/Guadeloupe,
America/Guatemala,
America/Guayaquil,
America/Guyana,
America/Halifax,
America/Havana,
America/Hermosillo,
America/Indiana/Indianapolis,
America/Indiana/Knox,
America/Indiana/Marengo,
America/Indiana/Petersburg,
America/Indiana/Tell_City,
America/Indiana/Vevay,
America/Indiana/Vincennes,
America/Indiana/Winamac,
America/Inuvik,
America/Iqaluit,
America/Jamaica,
America/Juneau,
America/Kentucky/Louisville,
America/Kentucky/Monticello,
America/Kralendijk,
America/La_Paz,
America/Lima,
America/Los_Angeles,
America/Lower_Princes,
America/Maceio,
America/Managua,
America/Manaus,
America/Marigot,
America/Martinique,
America/Matamoros,
America/Mazatlan,
America/Menominee,
America/Merida,
America/Metlakatla,
America/Mexico_City,
America/Miquelon,
America/Moncton,
America/Monterrey,
America/Montevideo,
America/Montreal,
America/Montserrat,
America/Nassau,
America/New_York,
America/Nipigon,
America/Nome,
America/Noronha,
America/North_Dakota/Beulah,
America/North_Dakota/Center,
America/North_Dakota/New_Salem,
America/Ojinaga,
America/Panama,
America/Pangnirtung,
America/Paramaribo,
America/Phoenix,
America/Port-au-Prince,
America/Port_of_Spain,
America/Porto_Velho,
America/Puerto_Rico,
America/Rainy_River,
America/Rankin_Inlet,
America/Recife,
America/Regina,
America/Resolute,
America/Rio_Branco,
America/Santa_Isabel,
America/Santarem,
America/Santiago,
America/Santo_Domingo,
America/Sao_Paulo,
America/Scoresbysund,
America/Shiprock,
America/Sitka,
America/St_Barthelemy,
America/St_Johns,
America/St_Kitts,
America/St_Lucia,
America/St_Thomas,
America/St_Vincent,
America/Swift_Current,
America/Tegucigalpa,
America/Thule,
America/Thunder_Bay,
America/Tijuana,
America/Toronto,
America/Tortola,
America/Vancouver,
America/Whitehorse,
America/Winnipeg,
America/Yakutat,
America/Yellowknife,
Antarctica/Casey,
Antarctica/Davis,
Antarctica/DumontDUrville,
Antarctica/Macquarie,
Antarctica/Mawson,
Antarctica/McMurdo,
Antarctica/Palmer,
Antarctica/Rothera,
Antarctica/South_Pole,
Antarctica/Syowa,
Antarctica/Troll,
Antarctica/Vostok,
Arctic/Longyearbyen,
Asia/Aden,
Asia/Almaty,
Asia/Amman,
Asia/Anadyr,
Asia/Aqtau,
Asia/Aqtobe,
Asia/Ashgabat,
Asia/Baghdad,
Asia/Bahrain,
Asia/Baku,
Asia/Bangkok,
Asia/Beirut,
Asia/Bishkek,
Asia/Brunei,
Asia/Chita,
Asia/Choibalsan,
Asia/Chongqing,
Asia/Colombo,
Asia/Damascus,
Asia/Dhaka,
Asia/Dili,
Asia/Dubai,
Asia/Dushanbe,
Asia/Gaza,
Asia/Harbin,
Asia/Hebron,
Asia/Ho_Chi_Minh,
Asia/Hong_Kong,
Asia/Hovd,
Asia/Irkutsk,
Asia/Jakarta,
Asia/Jayapura,
Asia/Jerusalem,
Asia/Kabul,
Asia/Kamchatka,
Asia/Karachi,
Asia/Kashgar,
Asia/Kathmandu,
Asia/Katmandu,
Asia/Khandyga,
Asia/Kolkata,
Asia/Krasnoyarsk,
Asia/Kuala_Lumpur,
Asia/Kuching,
Asia/Kuwait,
Asia/Macau,
Asia/Magadan,
Asia/Makassar,
Asia/Manila,
Asia/Muscat,
Asia/Nicosia,
Asia/Novokuznetsk,
Asia/Novosibirsk,
Asia/Omsk,
Asia/Oral,
Asia/Phnom_Penh,
Asia/Pontianak,
Asia/Pyongyang,
Asia/Qatar,
Asia/Qyzylorda,
Asia/Rangoon,
Asia/Riyadh,
Asia/Sakhalin,
Asia/Samarkand,
Asia/Seoul,
Asia/Shanghai,
Asia/Singapore,
Asia/Srednekolymsk,
Asia/Taipei,
Asia/Tashkent,
Asia/Tbilisi,
Asia/Tehran,
Asia/Thimphu,
Asia/Tokyo,
Asia/Ulaanbaatar,
Asia/Urumqi,
Asia/Ust-Nera,
Asia/Vientiane,
Asia/Vladivostok,
Asia/Yakutsk,
Asia/Yekaterinburg,
Asia/Yerevan,
Atlantic/Azores,
Atlantic/Bermuda,
Atlantic/Canary,
Atlantic/Cape_Verde,
Atlantic/Faroe,
Atlantic/Madeira,
Atlantic/Reykjavik,
Atlantic/South_Georgia,
Atlantic/St_Helena,
Atlantic/Stanley,
Australia/Adelaide,
Australia/Brisbane,
Australia/Broken_Hill,
Australia/Currie,
Australia/Darwin,
Australia/Eucla,
Australia/Hobart,
Australia/Lindeman,
Australia/Lord_Howe,
Australia/Melbourne,
Australia/Perth,
Australia/Sydney,
Europe/Amsterdam,
Europe/Andorra,
Europe/Athens,
Europe/Belgrade,
Europe/Berlin,
Europe/Bratislava,
Europe/Brussels,
Europe/Bucharest,
Europe/Budapest,
Europe/Busingen,
Europe/Chisinau,
Europe/Copenhagen,
Europe/Dublin,
Europe/Gibraltar,
Europe/Guernsey,
Europe/Helsinki,
Europe/Isle_of_Man,
Europe/Istanbul,
Europe/Jersey,
Europe/Kaliningrad,
Europe/Kiev,
Europe/Lisbon,
Europe/Ljubljana,
Europe/London,
Europe/Luxembourg,
Europe/Madrid,
Europe/Malta,
Europe/Mariehamn,
Europe/Minsk,
Europe/Monaco,
Europe/Moscow,
Europe/Oslo,
Europe/Paris,
Europe/Podgorica,
Europe/Prague,
Europe/Riga,
Europe/Rome,
Europe/Samara,
Europe/San_Marino,
Europe/Sarajevo,
Europe/Simferopol,
Europe/Skopje,
Europe/Sofia,
Europe/Stockholm,
Europe/Tallinn,
Europe/Tirane,
Europe/Uzhgorod,
Europe/Vaduz,
Europe/Vatican,
Europe/Vienna,
Europe/Vilnius,
Europe/Volgograd,
Europe/Warsaw,
Europe/Zagreb,
Europe/Zaporozhye,
Europe/Zurich,
GMT,
Indian/Antananarivo,
Indian/Chagos,
Indian/Christmas,
Indian/Cocos,
Indian/Comoro,
Indian/Kerguelen,
Indian/Mahe,
Indian/Maldives,
Indian/Mauritius,
Indian/Mayotte,
Indian/Reunion,
Pacific/Apia,
Pacific/Auckland,
Pacific/Bougainville,
Pacific/Chatham,
Pacific/Chuuk,
Pacific/Easter,
Pacific/Efate,
Pacific/Enderbury,
Pacific/Fakaofo,
Pacific/Fiji,
Pacific/Funafuti,
Pacific/Galapagos,
Pacific/Gambier,
Pacific/Guadalcanal,
Pacific/Guam,
Pacific/Honolulu,
Pacific/Johnston,
Pacific/Kiritimati,
Pacific/Kosrae,
Pacific/Kwajalein,
Pacific/Majuro,
Pacific/Marquesas,
Pacific/Midway,
Pacific/Nauru,
Pacific/Niue,
Pacific/Norfolk,
Pacific/Noumea,
Pacific/Pago_Pago,
Pacific/Palau,
Pacific/Pitcairn,
Pacific/Pohnpei,
Pacific/Ponape,
Pacific/Port_Moresby,
Pacific/Rarotonga,
Pacific/Saipan,
Pacific/Tahiti,
Pacific/Tarawa,
Pacific/Tongatapu,
Pacific/Truk,
Pacific/Wake,
Pacific/Wallis
)