List of Supported Timezones
PHP Manual

America

America
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/Fort_Nelson 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/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/Santarem America/Santiago
America/Santo_Domingo America/Sao_Paulo America/Scoresbysund 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    

List of Supported Timezones
PHP Manual