Here is example output from my machine, hope this helps!
> Available Ids are:
> Africa/Abidjan
> Africa/Accra
> Africa/Addis_Ababa
> Africa/Algiers
> Africa/Asmara
> Africa/Asmera
> 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/Timbuktu
> 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/ComodRivadavia
> 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/Atka
> America/Bahia
> America/Bahia_Banderas
> America/Barbados
> America/Belem
> America/Belize
> America/Blanc-Sablon
> America/Boa_Vista
> America/Bogota
> America/Boise
> America/Buenos_Aires
> America/Cambridge_Bay
> America/Campo_Grande
> America/Cancun
> America/Caracas
> America/Catamarca
> America/Cayenne
> America/Cayman
> America/Chicago
> America/Chihuahua
> America/Coral_Harbour
> America/Cordoba
> 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/Ensenada
> America/Fort_Nelson
> America/Fort_Wayne
> 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/Indianapolis
> America/Inuvik
> America/Iqaluit
> America/Jamaica
> America/Jujuy
> America/Juneau
> America/Kentucky/Louisville
> America/Kentucky/Monticello
> America/Knox_IN
> America/Kralendijk
> America/La_Paz
> America/Lima
> America/Los_Angeles
> America/Louisville
> America/Lower_Princes
> America/Maceio
> America/Managua
> America/Manaus
> America/Marigot
> America/Martinique
> America/Matamoros
> America/Mazatlan
> America/Mendoza
> 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_Acre
> America/Porto_Velho
> America/Puerto_Rico
> America/Punta_Arenas
> America/Rainy_River
> America/Rankin_Inlet
> America/Recife
> America/Regina
> America/Resolute
> America/Rio_Branco
> America/Rosario
> 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/Virgin
> 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/Ashkhabad
> Asia/Atyrau
> Asia/Baghdad
> Asia/Bahrain
> Asia/Baku
> Asia/Bangkok
> Asia/Barnaul
> Asia/Beirut
> Asia/Bishkek
> Asia/Brunei
> Asia/Calcutta
> Asia/Chita
> Asia/Choibalsan
> Asia/Chongqing
> Asia/Chungking
> Asia/Colombo
> Asia/Dacca
> Asia/Damascus
> Asia/Dhaka
> Asia/Dili
> Asia/Dubai
> Asia/Dushanbe
> Asia/Famagusta
> Asia/Gaza
> Asia/Harbin
> Asia/Hebron
> Asia/Ho_Chi_Minh
> Asia/Hong_Kong
> Asia/Hovd
> Asia/Irkutsk
> Asia/Istanbul
> 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/Macao
> 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/Saigon
> Asia/Sakhalin
> Asia/Samarkand
> Asia/Seoul
> Asia/Shanghai
> Asia/Singapore
> Asia/Srednekolymsk
> Asia/Taipei
> Asia/Tashkent
> Asia/Tbilisi
> Asia/Tehran
> Asia/Tel_Aviv
> Asia/Thimbu
> Asia/Thimphu
> Asia/Tokyo
> Asia/Tomsk
> Asia/Ujung_Pandang
> Asia/Ulaanbaatar
> Asia/Ulan_Bator
> Asia/Urumqi
> Asia/Ust-Nera
> Asia/Vientiane
> Asia/Vladivostok
> Asia/Yakutsk
> Asia/Yangon
> Asia/Yekaterinburg
> Asia/Yerevan
> Atlantic/Azores
> Atlantic/Bermuda
> Atlantic/Canary
> Atlantic/Cape_Verde
> Atlantic/Faeroe
> Atlantic/Faroe
> Atlantic/Jan_Mayen
> Atlantic/Madeira
> Atlantic/Reykjavik
> Atlantic/South_Georgia
> Atlantic/St_Helena
> Atlantic/Stanley
> Australia/ACT
> Australia/Adelaide
> Australia/Brisbane
> Australia/Broken_Hill
> Australia/Canberra
> Australia/Currie
> Australia/Darwin
> Australia/Eucla
> Australia/Hobart
> Australia/LHI
> Australia/Lindeman
> Australia/Lord_Howe
> Australia/Melbourne
> Australia/NSW
> Australia/North
> Australia/Perth
> Australia/Queensland
> Australia/South
> Australia/Sydney
> Australia/Tasmania
> Australia/Victoria
> Australia/West
> Australia/Yancowinna
> Brazil/Acre
> Brazil/DeNoronha
> Brazil/East
> Brazil/West
> CET
> CST6CDT
> Canada/Atlantic
> Canada/Central
> Canada/Eastern
> Canada/Mountain
> Canada/Newfoundland
> Canada/Pacific
> Canada/Saskatchewan
> Canada/Yukon
> Chile/Continental
> Chile/EasterIsland
> Cuba
> EET
> EST5EDT
> Egypt
> Eire
> Etc/GMT
> Etc/GMT+0
> Etc/GMT+1
> Etc/GMT+10
> Etc/GMT+11
> Etc/GMT+12
> Etc/GMT+2
> Etc/GMT+3
> Etc/GMT+4
> Etc/GMT+5
> Etc/GMT+6
> Etc/GMT+7
> Etc/GMT+8
> Etc/GMT+9
> Etc/GMT-0
> Etc/GMT-1
> Etc/GMT-10
> Etc/GMT-11
> Etc/GMT-12
> Etc/GMT-13
> Etc/GMT-14
> Etc/GMT-2
> Etc/GMT-3
> Etc/GMT-4
> Etc/GMT-5
> Etc/GMT-6
> Etc/GMT-7
> Etc/GMT-8
> Etc/GMT-9
> Etc/GMT0
> Etc/Greenwich
> Etc/UCT
> Etc/UTC
> Etc/Universal
> Etc/Zulu
> Europe/Amsterdam
> Europe/Andorra
> Europe/Astrakhan
> Europe/Athens
> Europe/Belfast
> 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/Kirov
> Europe/Lisbon
> Europe/Ljubljana
> Europe/London
> Europe/Luxembourg
> Europe/Madrid
> Europe/Malta
> Europe/Mariehamn
> Europe/Minsk
> Europe/Monaco
> Europe/Moscow
> Europe/Nicosia
> Europe/Oslo
> Europe/Paris
> Europe/Podgorica
> Europe/Prague
> Europe/Riga
> Europe/Rome
> Europe/Samara
> Europe/San_Marino
> Europe/Sarajevo
> Europe/Saratov
> Europe/Simferopol
> Europe/Skopje
> Europe/Sofia
> Europe/Stockholm
> Europe/Tallinn
> Europe/Tirane
> Europe/Tiraspol
> Europe/Ulyanovsk
> Europe/Uzhgorod
> Europe/Vaduz
> Europe/Vatican
> Europe/Vienna
> Europe/Vilnius
> Europe/Volgograd
> Europe/Warsaw
> Europe/Zagreb
> Europe/Zaporozhye
> Europe/Zurich
> GB
> GB-Eire
> GMT
> GMT0
> Greenwich
> Hongkong
> Iceland
> Indian/Antananarivo
> Indian/Chagos
> Indian/Christmas
> Indian/Cocos
> Indian/Comoro
> Indian/Kerguelen
> Indian/Mahe
> Indian/Maldives
> Indian/Mauritius
> Indian/Mayotte
> Indian/Reunion
> Iran
> Israel
> Jamaica
> Japan
> Kwajalein
> Libya
> MET
> MST7MDT
> Mexico/BajaNorte
> Mexico/BajaSur
> Mexico/General
> NZ
> NZ-CHAT
> Navajo
> PRC
> PST8PDT
> 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/Samoa
> Pacific/Tahiti
> Pacific/Tarawa
> Pacific/Tongatapu
> Pacific/Truk
> Pacific/Wake
> Pacific/Wallis
> Pacific/Yap
> Poland
> Portugal
> ROK
> Singapore
> SystemV/AST4
> SystemV/AST4ADT
> SystemV/CST6
> SystemV/CST6CDT
> SystemV/EST5
> SystemV/EST5EDT
> SystemV/HST10
> SystemV/MST7
> SystemV/MST7MDT
> SystemV/PST8
> SystemV/PST8PDT
> SystemV/YST9
> SystemV/YST9YDT
> Turkey
> UCT
> US/Alaska
> US/Aleutian
> US/Arizona
> US/Central
> US/East-Indiana
> US/Eastern
> US/Hawaii
> US/Indiana-Starke
> US/Michigan
> US/Mountain
> US/Pacific
> US/Pacific-New
> US/Samoa
> UTC
> Universal
> W-SU
> WET
> Zulu
> EST
> HST
> MST
> ACT
> AET
> AGT
> ART
> AST
> BET
> BST
> CAT
> CNT
> CST
> CTT
> EAT
> ECT
> IET
> IST
> JST
> MIT
> NET
> NST
> PLT
> PNT
> PRT
> PST
> SST
> VST
>
