'America/Rio_Branco', 'Brazil/DeNoronha' => 'America/Noronha', 'Brazil/East' => 'America/Recife', 'Brazil/West' => 'America/Manaus', 'Canada/Atlantic' => 'America/Halifax', 'Canada/Central' => 'America/Winnipeg', 'Canada/East-Saskatchewan' => 'America/Regina', 'Canada/Eastern' => 'America/Toronto', 'Canada/Mountain' =>'America/Edmonton', 'Canada/Newfoundland' => 'America/St_Johns', 'Canada/Pacific' => 'America/Vancouver', 'Canada/Saskatchewan' => 'America/Regina', 'Canada/Yukon' => 'America/Whitehorse', 'CET' => 'Europe/Berlin', 'Chile/Continental' => 'America/Santiago', 'Chile/EasterIsland' => 'Pacific/Easter', 'CST6CDT' => 'America/Chicago', 'Cuba' => 'America/Havana', 'EET' => 'Europe/Bucharest', 'Egypt' => 'Africa/Cairo', 'Eire' => 'Europe/Belfast', 'EST' => 'America/New_York', 'EST5EDT' => 'America/New_York', 'GB' => 'Europe/London', 'GB-Eire' => 'Europe/Belfast', 'Etc/GMT' => 'UTC', 'Etc/GMT+0' => 'UTC', 'Etc/GMT+1' => 'UTC', 'Etc/GMT+10' => 'UTC', 'Etc/GMT+11' => 'UTC', 'Etc/GMT+12' => 'UTC', 'Etc/GMT+2' => 'UTC', 'Etc/GMT+3' => 'UTC', 'Etc/GMT+4' => 'UTC', 'Etc/GMT+5' => 'UTC', 'Etc/GMT+6' => 'UTC', 'Etc/GMT+7' => 'UTC', 'Etc/GMT+8' => 'UTC', 'Etc/GMT+9' => 'UTC', 'Etc/GMT-0' => 'UTC', 'Etc/GMT-1' => 'UTC', 'Etc/GMT-10' => 'UTC', 'Etc/GMT-11' => 'UTC', 'Etc/GMT-12' => 'UTC', 'Etc/GMT-13' => 'UTC', 'Etc/GMT-14' => 'UTC', 'Etc/GMT-2' => 'UTC', 'Etc/GMT-3' => 'UTC', 'Etc/GMT-4' => 'UTC', 'Etc/GMT-5' => 'UTC', 'Etc/GMT-6' => 'UTC', 'Etc/GMT-7' => 'UTC', 'Etc/GMT-8' => 'UTC', 'Etc/GMT-9' => 'UTC', 'Etc/GMT0' => 'UTC', 'Etc/Greenwich' => 'UTC', 'Etc/UCT' => 'UTC', 'Etc/Universal' => 'UTC', 'Etc/UTC' => 'UTC', 'Etc/Zulu' => 'UTC', 'Factory' => 'UTC', 'GMT' => 'UTC', 'GMT+0' => 'UTC', 'GMT-0' => 'UTC', 'GMT0' => 'UTC', 'Hongkong' => 'Asia/Hong_Kong', 'HST' => 'Pacific/Honolulu', 'Iceland' => 'Atlantic/Reykjavik', 'Iran' => 'Asia/Tehran', 'Israel' => 'Asia/Tel_Aviv', 'Jamaica' => 'America/Jamaica', 'Japan' => 'Asia/Tokyo', 'Kwajalein' => 'Pacific/Kwajalein', 'Libya' => 'Africa/Tunis', 'MET' => 'Europe/Budapest', 'Mexico/BajaNorte' => 'America/Tijuana', 'Mexico/BajaSur' => 'America/Mazatlan', 'Mexico/General' => 'America/Mexico_City', 'MST' => 'America/Boise', 'MST7MDT' => 'America/Boise', 'Navajo' => 'America/Phoenix', 'NZ' => 'Pacific/Auckland', 'NZ-CHAT' => 'Pacific/Chatham', 'Poland' => 'Europe/Warsaw', 'Portugal' => 'Europe/Lisbon', 'PRC' => 'Asia/Chongqing', 'PST8PDT' => 'America/Los_Angeles', 'ROC' => 'Asia/Taipei', 'ROK' => 'Asia/Seoul', 'Singapore' =>'Asia/Singapore', 'Turkey' => 'Europe/Istanbul', 'US/Alaska' => 'America/Anchorage', 'US/Aleutian' => 'America/Adak', 'US/Arizona' => 'America/Phoenix', 'US/Central' => 'America/Chicago', 'US/East-Indiana' => 'America/Indianapolis', 'US/Eastern' => 'America/New_York', 'US/Hawaii' => 'Pacific/Honolulu', 'US/Indiana-Starke' => 'America/Indiana/Knox', 'US/Michigan' => 'America/Detroit', 'US/Mountain' => 'America/Boise', 'US/Pacific' => 'America/Los_Angeles', 'US/Pacific-New' => 'America/Los_Angeles', 'US/Samoa' => 'Pacific/Samoa', 'W-SU' => 'Europe/Moscow', 'WET' => 'Europe/Paris', ); if (array_key_exists($old, $replace)) { return $replace[$old]; } else { return $old; } }