Time.now.in_zone('America/Denver')
MAPPING = {
"International Date Line West" => "Etc/GMT+12"
"Midway Island" => "Pacific/Midway"
"American Samoa" => "Pacific/Pago_Pago"
"Hawaii" => "Pacific/Honolulu"
"Alaska" => "America/Juneau"
"Pacific Time (US & Canada)" => "America/Los_Angeles"
"Tijuana" => "America/Tijuana"
"Mountain Time (US & Canada)" => "America/Denver"
"Arizona" => "America/Phoenix"
"Chihuahua" => "America/Chihuahua"
"Mazatlan" => "America/Mazatlan"
"Central Time (US & Canada)" => "America/Chicago"
"Saskatchewan" => "America/Regina"
"Guadalajara" => "America/Mexico_City"
"Mexico City" => "America/Mexico_City"
"Monterrey" => "America/Monterrey"
"Central America" => "America/Guatemala"
"Eastern Time (US & Canada)" => "America/New_York"
"Indiana (East)" => "America/Indiana/Indianapolis"
"Bogota" => "America/Bogota"
"Lima" => "America/Lima"
"Quito" => "America/Lima"
"Atlantic Time (Canada)" => "America/Halifax"
"Caracas" => "America/Caracas"
"La Paz" => "America/La_Paz"
"Santiago" => "America/Santiago"
"Newfoundland" => "America/St_Johns"
"Brasilia" => "America/Sao_Paulo"
"Buenos Aires" => "America/Argentina/Buenos_Aires"
"Montevideo" => "America/Montevideo"
"Georgetown" => "America/Guyana"
"Puerto Rico" => "America/Puerto_Rico"
"Greenland" => "America/Godthab"
"Mid-Atlantic" => "Atlantic/South_Georgia"
"Azores" => "Atlantic/Azores"
"Cape Verde Is." => "Atlantic/Cape_Verde"
"Dublin" => "Europe/Dublin"
"Edinburgh" => "Europe/London"
"Lisbon" => "Europe/Lisbon"
"London" => "Europe/London"
"Casablanca" => "Africa/Casablanca"
"Monrovia" => "Africa/Monrovia"
"UTC" => "Etc/UTC"
"Belgrade" => "Europe/Belgrade"
"Bratislava" => "Europe/Bratislava"
"Budapest" => "Europe/Budapest"
"Ljubljana" => "Europe/Ljubljana"
"Prague" => "Europe/Prague"
"Sarajevo" => "Europe/Sarajevo"
"Skopje" => "Europe/Skopje"
"Warsaw" => "Europe/Warsaw"
"Zagreb" => "Europe/Zagreb"
"Brussels" => "Europe/Brussels"
"Copenhagen" => "Europe/Copenhagen"
"Madrid" => "Europe/Madrid"
"Paris" => "Europe/Paris"
"Amsterdam" => "Europe/Amsterdam"
"Berlin" => "Europe/Berlin"
"Bern" => "Europe/Zurich"
"Zurich" => "Europe/Zurich"
"Rome" => "Europe/Rome"
"Stockholm" => "Europe/Stockholm"
"Vienna" => "Europe/Vienna"
"West Central Africa" => "Africa/Algiers"
"Bucharest" => "Europe/Bucharest"
"Cairo" => "Africa/Cairo"
"Helsinki" => "Europe/Helsinki"
"Kyiv" => "Europe/Kiev"
"Riga" => "Europe/Riga"
"Sofia" => "Europe/Sofia"
"Tallinn" => "Europe/Tallinn"
"Vilnius" => "Europe/Vilnius"
"Athens" => "Europe/Athens"
"Istanbul" => "Europe/Istanbul"
"Minsk" => "Europe/Minsk"
"Jerusalem" => "Asia/Jerusalem"
"Harare" => "Africa/Harare"
"Pretoria" => "Africa/Johannesburg"
"Kaliningrad" => "Europe/Kaliningrad"
"Moscow" => "Europe/Moscow"
"St. Petersburg" => "Europe/Moscow"
"Volgograd" => "Europe/Volgograd"
"Samara" => "Europe/Samara"
"Kuwait" => "Asia/Kuwait"
"Riyadh" => "Asia/Riyadh"
"Nairobi" => "Africa/Nairobi"
"Baghdad" => "Asia/Baghdad"
"Tehran" => "Asia/Tehran"
"Abu Dhabi" => "Asia/Muscat"
"Muscat" => "Asia/Muscat"
"Baku" => "Asia/Baku"
"Tbilisi" => "Asia/Tbilisi"
"Yerevan" => "Asia/Yerevan"
"Kabul" => "Asia/Kabul"
"Ekaterinburg" => "Asia/Yekaterinburg"
"Islamabad" => "Asia/Karachi"
"Karachi" => "Asia/Karachi"
"Tashkent" => "Asia/Tashkent"
"Chennai" => "Asia/Kolkata"
"Kolkata" => "Asia/Kolkata"
"Mumbai" => "Asia/Kolkata"
"New Delhi" => "Asia/Kolkata"
"Kathmandu" => "Asia/Kathmandu"
"Astana" => "Asia/Dhaka"
"Dhaka" => "Asia/Dhaka"
"Sri Jayawardenepura" => "Asia/Colombo"
"Almaty" => "Asia/Almaty"
"Novosibirsk" => "Asia/Novosibirsk"
"Rangoon" => "Asia/Rangoon"
"Bangkok" => "Asia/Bangkok"
"Hanoi" => "Asia/Bangkok"
"Jakarta" => "Asia/Jakarta"
"Krasnoyarsk" => "Asia/Krasnoyarsk"
"Beijing" => "Asia/Shanghai"
"Chongqing" => "Asia/Chongqing"
"Hong Kong" => "Asia/Hong_Kong"
"Urumqi" => "Asia/Urumqi"
"Kuala Lumpur" => "Asia/Kuala_Lumpur"
"Singapore" => "Asia/Singapore"
"Taipei" => "Asia/Taipei"
"Perth" => "Australia/Perth"
"Irkutsk" => "Asia/Irkutsk"
"Ulaanbaatar" => "Asia/Ulaanbaatar"
"Seoul" => "Asia/Seoul"
"Osaka" => "Asia/Tokyo"
"Sapporo" => "Asia/Tokyo"
"Tokyo" => "Asia/Tokyo"
"Yakutsk" => "Asia/Yakutsk"
"Darwin" => "Australia/Darwin"
"Adelaide" => "Australia/Adelaide"
"Canberra" => "Australia/Melbourne"
"Melbourne" => "Australia/Melbourne"
"Sydney" => "Australia/Sydney"
"Brisbane" => "Australia/Brisbane"
"Hobart" => "Australia/Hobart"
"Vladivostok" => "Asia/Vladivostok"
"Guam" => "Pacific/Guam"
"Port Moresby" => "Pacific/Port_Moresby"
"Magadan" => "Asia/Magadan"
"Srednekolymsk" => "Asia/Srednekolymsk"
"Solomon Is." => "Pacific/Guadalcanal"
"New Caledonia" => "Pacific/Noumea"
"Fiji" => "Pacific/Fiji"
"Kamchatka" => "Asia/Kamchatka"
"Marshall Is." => "Pacific/Majuro"
"Auckland" => "Pacific/Auckland"
"Wellington" => "Pacific/Auckland"
"Nuku'alofa" => "Pacific/Tongatapu"
"Tokelau Is." => "Pacific/Fakaofo"
"Chatham Is." => "Pacific/Chatham"
"Samoa" => "Pacific/Apia"
}