America Country - Time with Timezones List in Array Format.
$america_timezones_list = array(
'+00:00||America/Danmarkshavn'=>'(+00:00) Danmarkshavn',
'-01:00||America/Scoresbysund'=>'(-01:00) Scoresbysund',
'-02:00||America/Miquelon'=>'(-02:00) Miquelon',
'-02:00||America/Noronha'=>'(-02:00) Noronha',
'-02:30||America/St_Johns'=>'(-02:30) St_Johns',
'-03:00||America/Araguaina'=>'(-03:00) Araguaina',
'-03:00||America/Argentina/Buenos_Aires'=>'(-03:00) Argentina/Buenos_Aires',
'-03:00||America/Argentina/Catamarca'=>'(-03:00) Argentina/Catamarca',
'-03:00||America/Argentina/Cordoba'=>'(-03:00) Argentina/Cordoba',
'-03:00||America/Argentina/Jujuy'=>'(-03:00) Argentina/Jujuy',
'-03:00||America/Argentina/La_Rioja'=>'(-03:00) Argentina/La_Rioja',
'-03:00||America/Argentina/Mendoza'=>'(-03:00) Argentina/Mendoza',
'-03:00||America/Argentina/Rio_Gallegos'=>'(-03:00) Argentina/Rio_Gallegos',
'-03:00||America/Argentina/Salta'=>'(-03:00) Argentina/Salta',
'-03:00||America/Argentina/San_Juan'=>'(-03:00) Argentina/San_Juan',
'-03:00||America/Argentina/San_Luis'=>'(-03:00) Argentina/San_Luis',
'-03:00||America/Argentina/Tucuman'=>'(-03:00) Argentina/Tucuman',
'-03:00||America/Argentina/Ushuaia'=>'(-03:00) Argentina/Ushuaia',
'-03:00||America/Asuncion'=>'(-03:00) Asuncion',
'-03:00||America/Bahia'=>'(-03:00) Bahia',
'-03:00||America/Belem'=>'(-03:00) Belem',
'-03:00||America/Cayenne'=>'(-03:00) Cayenne',
'-03:00||America/Fortaleza'=>'(-03:00) Fortaleza',
'-03:00||America/Glace_Bay'=>'(-03:00) Glace_Bay',
'-03:00||America/Godthab'=>'(-03:00) Godthab',
'-03:00||America/Goose_Bay'=>'(-03:00) Goose_Bay',
'-03:00||America/Halifax'=>'(-03:00) Halifax',
'-03:00||America/Maceio'=>'(-03:00) Maceio',
'-03:00||America/Moncton'=>'(-03:00) Moncton',
'-03:00||America/Montevideo'=>'(-03:00) Montevideo',
'-03:00||America/Paramaribo'=>'(-03:00) Paramaribo',
'-03:00||America/Punta_Arenas'=>'(-03:00) Punta_Arenas',
'-03:00||America/Recife'=>'(-03:00) Recife',
'-03:00||America/Santarem'=>'(-03:00) Santarem',
'-03:00||America/Santiago'=>'(-03:00) Santiago',
'-03:00||America/Sao_Paulo'=>'(-03:00) Sao_Paulo',
'-03:00||America/Thule'=>'(-03:00) Thule',
'-04:00||America/Anguilla'=>'(-04:00) Anguilla',
'-04:00||America/Antigua'=>'(-04:00) Antigua',
'-04:00||America/Aruba'=>'(-04:00) Aruba',
'-04:00||America/Barbados'=>'(-04:00) Barbados',
'-04:00||America/Blanc-Sablon'=>'(-04:00) Blanc-Sablon',
'-04:00||America/Boa_Vista'=>'(-04:00) Boa_Vista',
'-04:00||America/Campo_Grande'=>'(-04:00) Campo_Grande',
'-04:00||America/Caracas'=>'(-04:00) Caracas',
'-04:00||America/Cuiaba'=>'(-04:00) Cuiaba',
'-04:00||America/Curacao'=>'(-04:00) Curacao',
'-04:00||America/Detroit'=>'(-04:00) Detroit',
'-04:00||America/Dominica'=>'(-04:00) Dominica',
'-04:00||America/Grand_Turk'=>'(-04:00) Grand_Turk',
'-04:00||America/Grenada'=>'(-04:00) Grenada',
'-04:00||America/Guadeloupe'=>'(-04:00) Guadeloupe',
'-04:00||America/Guyana'=>'(-04:00) Guyana',
'-04:00||America/Havana'=>'(-04:00) Havana',
'-04:00||America/Indiana/Indianapolis'=>'(-04:00) Indiana/Indianapolis',
'-04:00||America/Indiana/Marengo'=>'(-04:00) Indiana/Marengo',
'-04:00||America/Indiana/Petersburg'=>'(-04:00) Indiana/Petersburg',
'-04:00||America/Indiana/Vevay'=>'(-04:00) Indiana/Vevay',
'-04:00||America/Indiana/Vincennes'=>'(-04:00) Indiana/Vincennes',
'-04:00||America/Indiana/Winamac'=>'(-04:00) Indiana/Winamac',
'-04:00||America/Iqaluit'=>'(-04:00) Iqaluit',
'-04:00||America/Kentucky/Louisville'=>'(-04:00) Kentucky/Louisville',
'-04:00||America/Kentucky/Monticello'=>'(-04:00) Kentucky/Monticello',
'-04:00||America/Kralendijk'=>'(-04:00) Kralendijk',
'-04:00||America/La_Paz'=>'(-04:00) La_Paz',
'-04:00||America/Lower_Princes'=>'(-04:00) Lower_Princes',
'-04:00||America/Manaus'=>'(-04:00) Manaus',
'-04:00||America/Marigot'=>'(-04:00) Marigot',
'-04:00||America/Martinique'=>'(-04:00) Martinique',
'-04:00||America/Montserrat'=>'(-04:00) Montserrat',
'-04:00||America/Nassau'=>'(-04:00) Nassau',
'-04:00||America/New_York'=>'(-04:00) New_York',
'-04:00||America/Nipigon'=>'(-04:00) Nipigon',
'-04:00||America/Pangnirtung'=>'(-04:00) Pangnirtung',
'-04:00||America/Port-au-Prince'=>'(-04:00) Port-au-Prince',
'-04:00||America/Port_of_Spain'=>'(-04:00) Port_of_Spain',
'-04:00||America/Porto_Velho'=>'(-04:00) Porto_Velho',
'-04:00||America/Puerto_Rico'=>'(-04:00) Puerto_Rico',
'-04:00||America/Santo_Domingo'=>'(-04:00) Santo_Domingo',
'-04:00||America/St_Barthelemy'=>'(-04:00) St_Barthelemy',
'-04:00||America/St_Kitts'=>'(-04:00) St_Kitts',
'-04:00||America/St_Lucia'=>'(-04:00) St_Lucia',
'-04:00||America/St_Thomas'=>'(-04:00) St_Thomas',
'-04:00||America/St_Vincent'=>'(-04:00) St_Vincent',
'-04:00||America/Thunder_Bay'=>'(-04:00) Thunder_Bay',
'-04:00||America/Toronto'=>'(-04:00) Toronto',
'-04:00||America/Tortola'=>'(-04:00) Tortola',
'-05:00||America/Atikokan'=>'(-05:00) Atikokan',
'-05:00||America/Bogota'=>'(-05:00) Bogota',
'-05:00||America/Cancun'=>'(-05:00) Cancun',
'-05:00||America/Cayman'=>'(-05:00) Cayman',
'-05:00||America/Chicago'=>'(-05:00) Chicago',
'-05:00||America/Eirunepe'=>'(-05:00) Eirunepe',
'-05:00||America/Guayaquil'=>'(-05:00) Guayaquil',
'-05:00||America/Indiana/Knox'=>'(-05:00) Indiana/Knox',
'-05:00||America/Indiana/Tell_City'=>'(-05:00) Indiana/Tell_City',
'-05:00||America/Jamaica'=>'(-05:00) Jamaica',
'-05:00||America/Lima'=>'(-05:00) Lima',
'-05:00||America/Matamoros'=>'(-05:00) Matamoros',
'-05:00||America/Menominee'=>'(-05:00) Menominee',
'-05:00||America/North_Dakota/Beulah'=>'(-05:00) North_Dakota/Beulah',
'-05:00||America/North_Dakota/Center'=>'(-05:00) North_Dakota/Center',
'-05:00||America/North_Dakota/New_Salem'=>'(-05:00) North_Dakota/New_Salem',
'-05:00||America/Panama'=>'(-05:00) Panama',
'-05:00||America/Rainy_River'=>'(-05:00) Rainy_River',
'-05:00||America/Rankin_Inlet'=>'(-05:00) Rankin_Inlet',
'-05:00||America/Resolute'=>'(-05:00) Resolute',
'-05:00||America/Rio_Branco'=>'(-05:00) Rio_Branco',
'-05:00||America/Winnipeg'=>'(-05:00) Winnipeg',
'-06:00||America/Bahia_Banderas'=>'(-06:00) Bahia_Banderas',
'-06:00||America/Belize'=>'(-06:00) Belize',
'-06:00||America/Boise'=>'(-06:00) Boise',
'-06:00||America/Cambridge_Bay'=>'(-06:00) Cambridge_Bay',
'-06:00||America/Costa_Rica'=>'(-06:00) Costa_Rica',
'-06:00||America/Denver'=>'(-06:00) Denver',
'-06:00||America/Edmonton'=>'(-06:00) Edmonton',
'-06:00||America/El_Salvador'=>'(-06:00) El_Salvador',
'-06:00||America/Guatemala'=>'(-06:00) Guatemala',
'-06:00||America/Inuvik'=>'(-06:00) Inuvik',
'-06:00||America/Managua'=>'(-06:00) Managua',
'-06:00||America/Merida'=>'(-06:00) Merida',
'-06:00||America/Mexico_City'=>'(-06:00) Mexico_City',
'-06:00||America/Monterrey'=>'(-06:00) Monterrey',
'-06:00||America/Ojinaga'=>'(-06:00) Ojinaga',
'-06:00||America/Regina'=>'(-06:00) Regina',
'-06:00||America/Swift_Current'=>'(-06:00) Swift_Current',
'-06:00||America/Tegucigalpa'=>'(-06:00) Tegucigalpa',
'-06:00||America/Yellowknife'=>'(-06:00) Yellowknife',
'-07:00||America/Chihuahua'=>'(-07:00) Chihuahua',
'-07:00||America/Creston'=>'(-07:00) Creston',
'-07:00||America/Dawson'=>'(-07:00) Dawson',
'-07:00||America/Dawson_Creek'=>'(-07:00) Dawson_Creek',
'-07:00||America/Fort_Nelson'=>'(-07:00) Fort_Nelson',
'-07:00||America/Hermosillo'=>'(-07:00) Hermosillo',
'-07:00||America/Los_Angeles'=>'(-07:00) Los_Angeles',
'-07:00||America/Mazatlan'=>'(-07:00) Mazatlan',
'-07:00||America/Phoenix'=>'(-07:00) Phoenix',
'-07:00||America/Tijuana'=>'(-07:00) Tijuana',
'-07:00||America/Vancouver'=>'(-07:00) Vancouver',
'-07:00||America/Whitehorse'=>'(-07:00) Whitehorse',
'-08:00||America/Anchorage'=>'(-08:00) Anchorage',
'-08:00||America/Juneau'=>'(-08:00) Juneau',
'-08:00||America/Metlakatla'=>'(-08:00) Metlakatla',
'-08:00||America/Nome'=>'(-08:00) Nome',
'-08:00||America/Sitka'=>'(-08:00) Sitka',
'-08:00||America/Yakutat'=>'(-08:00) Yakutat',
'-09:00||America/Adak'=>'(-09:00) Adak'
);
I have used it in many projects, sharing to help you. Thanks for asking this question.