Time Zones

Array of world time zones sorted according to current time offset.

Usage

Generate HTML code for SELECT tag:

use peterkahl\timeZones\timeZones;

echo '<select>'. PHP_EOL;
$zones = timeZones::getZones(true);
foreach ($zones as $code => $val) {
  echo '  <option value="'. $val[0] .'">(UTC'. $val[2] .') '. $val[3] .'</option>'. PHP_EOL;
}
echo '</select>'. PHP_EOL;

/*
<select>
  <option value="Pacific/Midway">(UTC-1100) Midway Atoll, United States</option>
  <option value="Pacific/Niue">(UTC-1100) Niue</option>
  <option value="Pacific/Pago_Pago">(UTC-1100) Pago Pago, United States</option>
  <option value="America/Adak">(UTC-1000) Adak, United States</option>
  <option value="Pacific/Honolulu">(UTC-1000) Honolulu, United States</option>
  <option value="Pacific/Johnston">(UTC-1000) Johnston Atoll, United States</option>
  <option value="Pacific/Rarotonga">(UTC-1000) Rarotonga, Cook Islands</option>
  <option value="Pacific/Tahiti">(UTC-1000) Tahiti, French Polynesia</option>
  <option value="Pacific/Marquesas">(UTC-0930) Marquesas Islands, French Polynesia</option>
  <option value="America/Anchorage">(UTC-0900) Anchorage, United States</option>
  <option value="Pacific/Gambier">(UTC-0900) Gambier Islands, French Polynesia</option>
  <option value="America/Juneau">(UTC-0900) Juneau, United States</option>
  <option value="America/Nome">(UTC-0900) Nome, United States</option>
  <option value="America/Sitka">(UTC-0900) Sitka, United States</option>
  <option value="America/Yakutat">(UTC-0900) Yakutat, United States</option>
  <option value="America/Dawson">(UTC-0800) Dawson, Canada</option>
  <option value="America/Los_Angeles">(UTC-0800) Los Angeles, United States</option>
  <option value="America/Metlakatla">(UTC-0800) Metlakatla, United States</option>
  <option value="Pacific/Pitcairn">(UTC-0800) Pitcairn Islands</option>
  <option value="America/Santa_Isabel">(UTC-0800) Santa Isabel, Mexico</option>
  <option value="America/Tijuana">(UTC-0800) Tijuana, Mexico</option>
  <option value="America/Vancouver">(UTC-0800) Vancouver, Canada</option>
  <option value="America/Whitehorse">(UTC-0800) Whitehorse, Canada</option>
  <option value="America/Boise">(UTC-0700) Boise, United States</option>
  <option value="America/Cambridge_Bay">(UTC-0700) Cambridge Bay, Canada</option>
  <option value="America/Chihuahua">(UTC-0700) Chihuahua City, Mexico</option>
  <option value="America/Creston">(UTC-0700) Creston, Canada</option>
  <option value="America/Dawson_Creek">(UTC-0700) Dawson Creek, Canada</option>
  <option value="America/Denver">(UTC-0700) Denver, United States</option>
  <option value="America/Edmonton">(UTC-0700) Edmonton, Canada</option>
  <option value="America/Fort_Nelson">(UTC-0700) Fort Nelson, Canada</option>
  <option value="America/Hermosillo">(UTC-0700) Hermosillo, Mexico</option>
  <option value="America/Inuvik">(UTC-0700) Inuvik, Canada</option>
  <option value="America/Mazatlan">(UTC-0700) Mazatlan, Mexico</option>
  <option value="America/Ojinaga">(UTC-0700) Ojinaga, Mexico</option>
  <option value="America/Phoenix">(UTC-0700) Phoenix, United States</option>
  <option value="America/Yellowknife">(UTC-0700) Yellowknife, Canada</option>
  <option value="America/Bahia_Banderas">(UTC-0600) Puerto Vallarta, Mexico</option>
  <option value="America/Belize">(UTC-0600) Belize City, Belize</option>
  <option value="America/North_Dakota/Beulah">(UTC-0600) Beulah, United States</option>
  <option value="America/North_Dakota/Center">(UTC-0600) Center, United States</option>
  <option value="America/Chicago">(UTC-0600) Chicago, United States</option>
  <option value="America/Costa_Rica">(UTC-0600) San José, Costa Rica</option>
  <option value="America/El_Salvador">(UTC-0600) San Salvador, El Salvador</option>
  <option value="Pacific/Galapagos">(UTC-0600) Galápagos Islands, Ecuador</option>
  <option value="America/Guatemala">(UTC-0600) Guatemala City, Guatemala</option>
  <option value="America/Indiana/Knox">(UTC-0600) Knox, United States</option>
  <option value="America/Managua">(UTC-0600) Managua, Nicaragua</option>
  <option value="America/Matamoros">(UTC-0600) Matamoros, Mexico</option>
  <option value="America/Menominee">(UTC-0600) Menominee, United States</option>
  <option value="America/Merida">(UTC-0600) Mérida, Mexico</option>
  <option value="America/Mexico_City">(UTC-0600) Mexico City, Mexico</option>
  <option value="America/Monterrey">(UTC-0600) Monterrey, Mexico</option>
  <option value="America/North_Dakota/New_Salem">(UTC-0600) New Salem, United States</option>
  <option value="America/Rainy_River">(UTC-0600) Rainy River, Canada</option>
  <option value="America/Rankin_Inlet">(UTC-0600) Rankin Inlet, Canada</option>
  <option value="America/Regina">(UTC-0600) Regina, Canada</option>
  <option value="America/Resolute">(UTC-0600) Resolute, Canada</option>
  <option value="America/Swift_Current">(UTC-0600) Swift Current, Canada</option>
  <option value="America/Tegucigalpa">(UTC-0600) Tegucigalpa, Honduras</option>
  <option value="America/Indiana/Tell_City">(UTC-0600) Tell City, United States</option>
  <option value="America/Winnipeg">(UTC-0600) Winnipeg, Canada</option>
  <option value="America/Atikokan">(UTC-0500) Atikokan, Canada</option>
  <option value="America/Bogota">(UTC-0500) Bogotá, Colombia</option>
  <option value="America/Cancun">(UTC-0500) Cancún, Mexico</option>
  <option value="America/Cayman">(UTC-0500) Cayman Islands</option>
  <option value="America/Detroit">(UTC-0500) Detroit, United States</option>
  <option value="Pacific/Easter">(UTC-0500) Easter Island, Chile</option>
  <option value="America/Eirunepe">(UTC-0500) Eirunepé, Brazil</option>
  <option value="America/Guayaquil">(UTC-0500) Guayaquil, Ecuador</option>
  <option value="America/Havana">(UTC-0500) Havana, Cuba</option>
  <option value="America/Indiana/Indianapolis">(UTC-0500) Indianapolis, United States</option>
  <option value="America/Iqaluit">(UTC-0500) Iqaluit, Canada</option>
  <option value="America/Jamaica">(UTC-0500) Kingston, Jamaica</option>
  <option value="America/Lima">(UTC-0500) Lima, Peru</option>
  <option value="America/Kentucky/Louisville">(UTC-0500) Louisville, United States</option>
  <option value="America/Indiana/Marengo">(UTC-0500) Marengo, United States</option>
  <option value="America/Kentucky/Monticello">(UTC-0500) Monticello, United States</option>
  <option value="America/Nassau">(UTC-0500) Nassau, Bahamas</option>
  <option value="America/New_York">(UTC-0500) New York, United States</option>
  <option value="America/Nipigon">(UTC-0500) Nipigon, Canada</option>
  <option value="America/Panama">(UTC-0500) Panama City, Panama</option>
  <option value="America/Pangnirtung">(UTC-0500) Pangnirtung, Canada</option>
  <option value="America/Indiana/Petersburg">(UTC-0500) Petersburg, United States</option>
  <option value="America/Port-au-Prince">(UTC-0500) Port-au-Prince, Haiti</option>
  <option value="America/Rio_Branco">(UTC-0500) Rio Branco, Brazil</option>
  <option value="America/Thunder_Bay">(UTC-0500) Thunder Bay, Canada</option>
  <option value="America/Toronto">(UTC-0500) Toronto, Canada</option>
  <option value="America/Indiana/Vevay">(UTC-0500) Vevay, United States</option>
  <option value="America/Indiana/Vincennes">(UTC-0500) Vincennes, United States</option>
  <option value="America/Indiana/Winamac">(UTC-0500) Winamac, United States</option>
  <option value="America/Grand_Turk">(UTC-0500) Grand Turk, Turks and Caicos Islands</option>
  <option value="America/Anguilla">(UTC-0400) Anguilla</option>
  <option value="America/Antigua">(UTC-0400) Antigua and Barbuda</option>
  <option value="America/Aruba">(UTC-0400) Oranjestad, Aruba</option>
  <option value="America/Barbados">(UTC-0400) Bridgetown, Barbados</option>
  <option value="Atlantic/Bermuda">(UTC-0400) Bermuda</option>
  <option value="America/Blanc-Sablon">(UTC-0400) Blanc-Sablon, Canada</option>
  <option value="America/Boa_Vista">(UTC-0400) Boa Vista, Brazil</option>
  <option value="America/Caracas">(UTC-0400) Caracas, Venezuela</option>
  <option value="America/Curacao">(UTC-0400) Willemstad, Curaçao</option>
  <option value="America/Dominica">(UTC-0400) Roseau, Dominica</option>
  <option value="America/Glace_Bay">(UTC-0400) Glace Bay, Canada</option>
  <option value="America/Goose_Bay">(UTC-0400) Goose Bay, Canada</option>
  <option value="America/Grenada">(UTC-0400) St George's, Grenada</option>
  <option value="America/Guadeloupe">(UTC-0400) Basse-Terre, Guadeloupe</option>
  <option value="America/Guyana">(UTC-0400) Georgetown, Guyana</option>
  <option value="America/Halifax">(UTC-0400) Halifax, Canada</option>
  <option value="America/Kralendijk">(UTC-0400) Kralendijk, Caribbean Netherlands</option>
  <option value="America/La_Paz">(UTC-0400) La Paz, Bolivia</option>
  <option value="America/Lower_Princes">(UTC-0400) Sint Maarten</option>
  <option value="America/Manaus">(UTC-0400) Manaus, Brazil</option>
  <option value="America/Marigot">(UTC-0400) Marigot, Saint Martin</option>
  <option value="America/Martinique">(UTC-0400) Martinique</option>
  <option value="America/Moncton">(UTC-0400) Moncton, Canada</option>
  <option value="America/Montserrat">(UTC-0400) Montserrat</option>
  <option value="America/Port_of_Spain">(UTC-0400) Port of Spain, Trinidad and Tobago</option>
  <option value="America/Porto_Velho">(UTC-0400) Porto Velho, Brazil</option>
  <option value="America/Puerto_Rico">(UTC-0400) San Juan, Puerto Rico</option>
  <option value="America/Santo_Domingo">(UTC-0400) Santo Domingo, Dominican Republic</option>
  <option value="America/St_Barthelemy">(UTC-0400) Saint Barthélemy</option>
  <option value="America/St_Kitts">(UTC-0400) Saint Kitts and Nevis</option>
  <option value="America/St_Lucia">(UTC-0400) Saint Lucia</option>
  <option value="America/St_Thomas">(UTC-0400) Saint Thomas, U.S. Virgin Islands</option>
  <option value="America/St_Vincent">(UTC-0400) Saint Vincent and the Grenadines</option>
  <option value="America/Thule">(UTC-0400) Pituffik, Greenland</option>
  <option value="America/Tortola">(UTC-0400) Tortola, British Virgin Islands</option>
  <option value="America/Campo_Grande">(UTC-0400) Campo Grande, Brazil</option>
  <option value="America/Cuiaba">(UTC-0400) Cuiabá, Brazil</option>
  <option value="America/St_Johns">(UTC-0330) St. John's, Canada</option>
  <option value="America/Araguaina">(UTC-0300) Araguaína, Brazil</option>
  <option value="America/Asuncion">(UTC-0300) Asunción, Paraguay</option>
  <option value="America/Bahia">(UTC-0300) Salvador, Brazil</option>
  <option value="America/Belem">(UTC-0300) Belém, Brazil</option>
  <option value="America/Argentina/Buenos_Aires">(UTC-0300) Buenos Aires, Argentina</option>
  <option value="America/Argentina/Catamarca">(UTC-0300) Catamarca, Argentina</option>
  <option value="America/Cayenne">(UTC-0300) Cayenne, French Guiana</option>
  <option value="America/Argentina/Cordoba">(UTC-0300) Córdoba, Argentina</option>
  <option value="America/Fortaleza">(UTC-0300) Fortaleza, Brazil</option>
  <option value="America/Argentina/La_Rioja">(UTC-0300) La Rioja, Argentina</option>
  <option value="America/Maceio">(UTC-0300) Maceió, Brazil</option>
  <option value="America/Argentina/Mendoza">(UTC-0300) Mendoza, Argentina</option>
  <option value="America/Miquelon">(UTC-0300) Miquelon-Langlade, Saint Pierre and Miquelon</option>
  <option value="America/Montevideo">(UTC-0300) Montevideo, Uruguay</option>
  <option value="America/Godthab">(UTC-0300) Nuuk, Greenland</option>
  <option value="Antarctica/Palmer">(UTC-0300) Palmer Station, Antarctica</option>
  <option value="America/Paramaribo">(UTC-0300) Paramaribo, Suriname</option>
  <option value="America/Recife">(UTC-0300) Recife, Brazil</option>
  <option value="America/Argentina/Rio_Gallegos">(UTC-0300) Río Gallegos, Argentina</option>
  <option value="Antarctica/Rothera">(UTC-0300) Rothera Station, Antarctica</option>
  <option value="America/Argentina/Salta">(UTC-0300) Salta, Argentina</option>
  <option value="America/Argentina/San_Juan">(UTC-0300) San Juan, Argentina</option>
  <option value="America/Argentina/San_Luis">(UTC-0300) San Luis, Argentina</option>
  <option value="America/Argentina/Jujuy">(UTC-0300) San Salvador de Jujuy, Argentina</option>
  <option value="America/Santarem">(UTC-0300) Santarém, Brazil</option>
  <option value="America/Santiago">(UTC-0300) Santiago, Chile</option>
  <option value="America/Argentina/Tucuman">(UTC-0300) San Miguel de Tucumán, Argentina</option>
  <option value="Atlantic/Stanley">(UTC-0300) Stanley, Canada</option>
  <option value="America/Argentina/Ushuaia">(UTC-0300) Ushuaia, Argentina</option>
  <option value="America/Sao_Paulo">(UTC-0300) São Paulo, Brazil</option>
  <option value="America/Noronha">(UTC-0200) Fernando de Noronha, Brazil</option>
  <option value="Atlantic/South_Georgia">(UTC-0200) South Georgia and the South Sandwich Islands</option>
  <option value="Atlantic/Azores">(UTC-0100) Azores, Portugal</option>
  <option value="Atlantic/Cape_Verde">(UTC-0100) Cape Verde</option>
  <option value="America/Scoresbysund">(UTC-0100) Scoresby Sund, Greenland</option>
  <option value="Africa/Abidjan">(UTC+0000) Abidjan, Côte d'Ivoire</option>
  <option value="Africa/Accra">(UTC+0000) Accra, Ghana</option>
  <option value="Africa/Bamako">(UTC+0000) Bamako, Mali</option>
  <option value="Africa/Banjul">(UTC+0000) Banjul, Gambia</option>
  <option value="Africa/Bissau">(UTC+0000) Bissau, Guinea-Bissau</option>
  <option value="Atlantic/Canary">(UTC+0000) Las Palmas de Gran Canaria, Spain</option>
  <option value="Africa/Conakry">(UTC+0000) Conakry, Guinea</option>
  <option value="Africa/Dakar">(UTC+0000) Dakar, Senegal</option>
  <option value="Europe/Dublin">(UTC+0000) Dublin, Ireland</option>
  <option value="Atlantic/Faroe">(UTC+0000) Faroe Islands</option>
  <option value="Africa/Freetown">(UTC+0000) Freetown, Sierra Leone</option>
  <option value="Europe/Guernsey">(UTC+0000) Guernsey</option>
  <option value="Europe/Isle_of_Man">(UTC+0000) Isle of Man</option>
  <option value="Europe/Jersey">(UTC+0000) Jersey</option>
  <option value="Europe/Lisbon">(UTC+0000) Lisbon, Portugal</option>
  <option value="Africa/Lome">(UTC+0000) Lome, Togo</option>
  <option value="Europe/London">(UTC+0000) London, United Kingdom</option>
  <option value="Atlantic/Madeira">(UTC+0000) São Martinho, Portugal</option>
  <option value="Africa/Monrovia">(UTC+0000) Monrovia, Liberia</option>
  <option value="Africa/Nouakchott">(UTC+0000) Nouakchott, Mauritania</option>
  <option value="Africa/Ouagadougou">(UTC+0000) Ouagadougou, Burkina Faso</option>
  <option value="Atlantic/Reykjavik">(UTC+0000) Reykjavík, Iceland</option>
  <option value="Africa/Sao_Tome">(UTC+0000) São Tomé and Príncipe</option>
  <option value="Atlantic/St_Helena">(UTC+0000) Saint Helena, Ascension and Tristan da Cunha</option>
  <option value="Antarctica/Troll">(UTC+0000) Troll Station, Antarctica</option>
  <option value="Africa/Casablanca">(UTC+0100) Casablanca, Morocco</option>
  <option value="Africa/El_Aaiun">(UTC+0100) El-Aaiún, Western Sahara</option>
  <option value="Africa/Algiers">(UTC+0100) Algiers, Algeria</option>
  <option value="Europe/Amsterdam">(UTC+0100) Amsterdam, Netherlands</option>
  <option value="Europe/Andorra">(UTC+0100) Andorra</option>
  <option value="Africa/Bangui">(UTC+0100) Bangui, Central African Republic</option>
  <option value="Europe/Belgrade">(UTC+0100) Belgrade, Serbia</option>
  <option value="Europe/Berlin">(UTC+0100) Berlin, Germany</option>
  <option value="Europe/Bratislava">(UTC+0100) Bratislava, Slovakia</option>
  <option value="Africa/Brazzaville">(UTC+0100) Brazzaville, Republic of the Congo</option>
  <option value="Europe/Brussels">(UTC+0100) Brussels, Belgium</option>
  <option value="Europe/Budapest">(UTC+0100) Budapest, Hungary</option>
  <option value="Europe/Busingen">(UTC+0100) Büsingen am Hochrhein, Germany</option>
  <option value="Africa/Ceuta">(UTC+0100) Ceuta, Spain</option>
  <option value="Europe/Copenhagen">(UTC+0100) Copenhagen, Denmark</option>
  <option value="Africa/Douala">(UTC+0100) Douala, Cameroon</option>
  <option value="Europe/Gibraltar">(UTC+0100) Gibraltar</option>
  <option value="Africa/Kinshasa">(UTC+0100) Kinshasa, Democratic Republic of the Congo</option>
  <option value="Africa/Lagos">(UTC+0100) Lagos, Nigeria</option>
  <option value="Africa/Libreville">(UTC+0100) Libreville, Gabon</option>
  <option value="Europe/Ljubljana">(UTC+0100) Ljubljana, Slovenia</option>
  <option value="Arctic/Longyearbyen">(UTC+0100) Longyearbyen, Svalbard and Jan Mayen</option>
  <option value="Africa/Luanda">(UTC+0100) Luanda, Angola</option>
  <option value="Europe/Luxembourg">(UTC+0100) Luxembourg City, Luxembourg</option>
  <option value="Europe/Madrid">(UTC+0100) Madrid, Spain</option>
  <option value="Africa/Malabo">(UTC+0100) Malabo, Equatorial Guinea</option>
  <option value="Europe/Malta">(UTC+0100) Valletta, Malta</option>
  <option value="Europe/Monaco">(UTC+0100) Monaco City, Monaco</option>
  <option value="Africa/Ndjamena">(UTC+0100) N'Djamena, Chad</option>
  <option value="Africa/Niamey">(UTC+0100) Niamey, Niger</option>
  <option value="Europe/Oslo">(UTC+0100) Oslo, Norway</option>
  <option value="Europe/Paris">(UTC+0100) Paris, France</option>
  <option value="Europe/Podgorica">(UTC+0100) Podgorica, Montenegro</option>
  <option value="Africa/Porto-Novo">(UTC+0100) Porto-Novo, Benin</option>
  <option value="Europe/Prague">(UTC+0100) Prague, Czechia</option>
  <option value="Europe/Rome">(UTC+0100) Rome, Italy</option>
  <option value="Europe/San_Marino">(UTC+0100) San Marino</option>
  <option value="Europe/Sarajevo">(UTC+0100) Sarajevo, Bosnia and Herzegovina</option>
  <option value="Europe/Skopje">(UTC+0100) Skopje, Macedonia</option>
  <option value="Europe/Stockholm">(UTC+0100) Stockholm, Sweden</option>
  <option value="Europe/Tirane">(UTC+0100) Tirane, Albania</option>
  <option value="Africa/Tunis">(UTC+0100) Tunis, Tunisia</option>
  <option value="Europe/Vaduz">(UTC+0100) Vaduz, Liechtenstein</option>
  <option value="Europe/Vatican">(UTC+0100) Vatican City</option>
  <option value="Europe/Vienna">(UTC+0100) Vienna, Austria</option>
  <option value="Europe/Warsaw">(UTC+0100) Warsaw, Poland</option>
  <option value="Europe/Zagreb">(UTC+0100) Zagreb, Croatia</option>
  <option value="Europe/Zurich">(UTC+0100) Zürich, Switzerland</option>
  <option value="Asia/Amman">(UTC+0200) Amman, Jordan</option>
  <option value="Europe/Athens">(UTC+0200) Athens, Greece</option>
  <option value="Asia/Beirut">(UTC+0200) Beirut, Lebanon</option>
  <option value="Africa/Blantyre">(UTC+0200) Blantyre, Malawi</option>
  <option value="Europe/Bucharest">(UTC+0200) Bucharest, Romania</option>
  <option value="Africa/Bujumbura">(UTC+0200) Bujumbura, Burundi</option>
  <option value="Africa/Cairo">(UTC+0200) Cairo, Egypt</option>
  <option value="Europe/Chisinau">(UTC+0200) Chisinau, Moldova</option>
  <option value="Asia/Damascus">(UTC+0200) Damascus, Syria</option>
  <option value="Africa/Gaborone">(UTC+0200) Gaborone, Botswana</option>
  <option value="Asia/Gaza">(UTC+0200) Gaza Strip, Palestine</option>
  <option value="Africa/Harare">(UTC+0200) Harare, Zimbabwe</option>
  <option value="Asia/Hebron">(UTC+0200) Hebron, Palestine</option>
  <option value="Europe/Helsinki">(UTC+0200) Helsinki, Finland</option>
  <option value="Asia/Jerusalem">(UTC+0200) Jerusalem, Israel</option>
  <option value="Africa/Johannesburg">(UTC+0200) Johannesburg, South Africa</option>
  <option value="Europe/Kaliningrad">(UTC+0200) Kaliningrad, Russia</option>
  <option value="Europe/Kiev">(UTC+0200) Kiev, Ukraine</option>
  <option value="Africa/Kigali">(UTC+0200) Kigali, Rwanda</option>
  <option value="Africa/Lubumbashi">(UTC+0200) Lubumbashi, Democratic Republic of the Congo</option>
  <option value="Africa/Lusaka">(UTC+0200) Lusaka, Zambia</option>
  <option value="Africa/Maputo">(UTC+0200) Maputo, Mozambique</option>
  <option value="Europe/Mariehamn">(UTC+0200) Mariehamn, Åland Islands</option>
  <option value="Africa/Maseru">(UTC+0200) Maseru, Lesotho</option>
  <option value="Asia/Nicosia">(UTC+0200) Nicosia, Cyprus</option>
  <option value="Africa/Mbabane">(UTC+0200) Mbabane, Swaziland</option>
  <option value="Europe/Riga">(UTC+0200) Riga, Latvia</option>
  <option value="Europe/Sofia">(UTC+0200) Sofia, Bulgaria</option>
  <option value="Europe/Tallinn">(UTC+0200) Tallinn, Estonia</option>
  <option value="Africa/Tripoli">(UTC+0200) Tripoli, Libya</option>
  <option value="Europe/Uzhgorod">(UTC+0200) Uzhgorod, Ukraine</option>
  <option value="Europe/Vilnius">(UTC+0200) Vilnius, Lithuania</option>
  <option value="Africa/Windhoek">(UTC+0200) Windhoek, Namibia</option>
  <option value="Europe/Zaporozhye">(UTC+0200) Zaporizhia, Ukraine</option>
  <option value="Africa/Khartoum">(UTC+0200) Khartoum, Sudan</option>
  <option value="Africa/Addis_Ababa">(UTC+0300) Addis Ababa, Ethiopia</option>
  <option value="Asia/Aden">(UTC+0300) Aden, Yemen</option>
  <option value="Indian/Antananarivo">(UTC+0300) Antananarivo, Madagascar</option>
  <option value="Africa/Asmara">(UTC+0300) Asmara, Eritrea</option>
  <option value="Asia/Baghdad">(UTC+0300) Baghdad, Iraq</option>
  <option value="Asia/Bahrain">(UTC+0300) Manama, Bahrain</option>
  <option value="Indian/Comoro">(UTC+0300) Moroni, Comoros</option>
  <option value="Africa/Dar_es_Salaam">(UTC+0300) Dar es Salaam, Tanzania</option>
  <option value="Africa/Djibouti">(UTC+0300) Djibouti</option>
  <option value="Europe/Istanbul">(UTC+0300) Istanbul, Turkey</option>
  <option value="Africa/Juba">(UTC+0300) Juba, South Sudan</option>
  <option value="Africa/Kampala">(UTC+0300) Kampala, Uganda</option>
  <option value="Asia/Kuwait">(UTC+0300) Kuwait City, Kuwait</option>
  <option value="Indian/Mayotte">(UTC+0300) Mamoudzou, Mayotte</option>
  <option value="Europe/Minsk">(UTC+0300) Minsk, Belarus</option>
  <option value="Africa/Mogadishu">(UTC+0300) Mogadishu, Somalia</option>
  <option value="Europe/Moscow">(UTC+0300) Moscow, Russia</option>
  <option value="Africa/Nairobi">(UTC+0300) Nairobi, Kenya</option>
  <option value="Asia/Qatar">(UTC+0300) Qatar</option>
  <option value="Asia/Riyadh">(UTC+0300) Riyadh, Saudi Arabia</option>
  <option value="Europe/Simferopol">(UTC+0300) Simferopol, Ukraine</option>
  <option value="Antarctica/Syowa">(UTC+0300) Syowa Station, Antarctica</option>
  <option value="Asia/Tehran">(UTC+0330) Tehran, Iran</option>
  <option value="Europe/Volgograd">(UTC+0400) Volgograd, Russia</option>
  <option value="Asia/Baku">(UTC+0400) Baku, Azerbaijan</option>
  <option value="Asia/Dubai">(UTC+0400) Dubai, United Arab Emirates</option>
  <option value="Indian/Mahe">(UTC+0400) Mahé, Seychelles</option>
  <option value="Indian/Mauritius">(UTC+0400) Mauritius</option>
  <option value="Asia/Muscat">(UTC+0400) Muscat, Oman</option>
  <option value="Indian/Reunion">(UTC+0400) Saint-Denis, Réunion</option>
  <option value="Europe/Samara">(UTC+0400) Samara, Russia</option>
  <option value="Asia/Tbilisi">(UTC+0400) Tbilisi, Georgia</option>
  <option value="Asia/Yerevan">(UTC+0400) Yerevan, Armenia</option>
  <option value="Asia/Kabul">(UTC+0430) Kabul, Afghanistan</option>
  <option value="Asia/Aqtau">(UTC+0500) Aktau, Kazakhstan</option>
  <option value="Asia/Aqtobe">(UTC+0500) Aktobe, Kazakhstan</option>
  <option value="Asia/Ashgabat">(UTC+0500) Ashgabat, Turkmenistan</option>
  <option value="Asia/Dushanbe">(UTC+0500) Dushanbe, Tajikistan</option>
  <option value="Asia/Karachi">(UTC+0500) Karachi, Pakistan</option>
  <option value="Indian/Kerguelen">(UTC+0500) Kerguelen Islands, French Southern and Antarctic Lands</option>
  <option value="Indian/Maldives">(UTC+0500) Maldives</option>
  <option value="Antarctica/Mawson">(UTC+0500) Mawson Station, Antarctica</option>
  <option value="Asia/Oral">(UTC+0500) Uralsk, Kazakhstan</option>
  <option value="Asia/Samarkand">(UTC+0500) Samarkand, Uzbekistan</option>
  <option value="Asia/Tashkent">(UTC+0500) Tashkent, Uzbekistan</option>
  <option value="Asia/Yekaterinburg">(UTC+0500) Yekaterinburg, Russia</option>
  <option value="Asia/Qyzylorda">(UTC+0500) Kyzylorda, Kazakhstan</option>
  <option value="Asia/Colombo">(UTC+0530) Colombo, Sri Lanka</option>
  <option value="Asia/Kolkata">(UTC+0530) Kolkata, India</option>
  <option value="Asia/Kathmandu">(UTC+0545) Kathmandu, Nepal</option>
  <option value="Asia/Almaty">(UTC+0600) Almaty, Kazakhstan</option>
  <option value="Asia/Bishkek">(UTC+0600) Bishkek, Kyrgyzstan</option>
  <option value="Indian/Chagos">(UTC+0600) Chagosøerne, British Indian Ocean Territory</option>
  <option value="Asia/Dhaka">(UTC+0600) Dhaka, Bangladesh</option>
  <option value="Asia/Omsk">(UTC+0600) Omsk, Russia</option>
  <option value="Asia/Thimphu">(UTC+0600) Thimphu, Bhutan</option>
  <option value="Asia/Urumqi">(UTC+0600) Urumqi, China</option>
  <option value="Antarctica/Vostok">(UTC+0600) Vostok Station, Antarctica</option>
  <option value="Indian/Cocos">(UTC+0630) Cocos (Keeling) Islands</option>
  <option value="Asia/Rangoon">(UTC+0630) Yangon, Myanmar</option>
  <option value="Asia/Novosibirsk">(UTC+0700) Novosibirsk, Russia</option>
  <option value="Asia/Bangkok">(UTC+0700) Bangkok, Thailand</option>
  <option value="Indian/Christmas">(UTC+0700) Christmas Island</option>
  <option value="Antarctica/Davis">(UTC+0700) Davis Station, Antarctica</option>
  <option value="Asia/Ho_Chi_Minh">(UTC+0700) Ho Chi Minh City, Vietnam</option>
  <option value="Asia/Hovd">(UTC+0700) Khovd, Mongolia</option>
  <option value="Asia/Jakarta">(UTC+0700) Jakarta, Indonesia</option>
  <option value="Asia/Krasnoyarsk">(UTC+0700) Krasnoyarsk, Russia</option>
  <option value="Asia/Novokuznetsk">(UTC+0700) Novokuznetsk, Russia</option>
  <option value="Asia/Phnom_Penh">(UTC+0700) Phnom Penh, Cambodia</option>
  <option value="Asia/Pontianak">(UTC+0700) Pontianak, Indonesia</option>
  <option value="Asia/Vientiane">(UTC+0700) Vientiane, Laos</option>
  <option value="Asia/Brunei">(UTC+0800) Brunei</option>
  <option value="Antarctica/Casey">(UTC+0800) Casey Station, Antarctica</option>
  <option value="Asia/Choibalsan">(UTC+0800) Choibalsan, Mongolia</option>
  <option value="Asia/Harbin">(UTC+0800) Harbin, China</option>
  <option value="Asia/Hong_Kong">(UTC+0800) Hong Kong</option>
  <option value="Asia/Irkutsk">(UTC+0800) Irkutsk, Russia</option>
  <option value="Asia/Kuala_Lumpur">(UTC+0800) Kuala Lumpur, Malaysia</option>
  <option value="Asia/Kuching">(UTC+0800) Kuching, Malaysia</option>
  <option value="Asia/Macau">(UTC+0800) Macau</option>
  <option value="Asia/Makassar">(UTC+0800) Makassar, Indonesia</option>
  <option value="Asia/Manila">(UTC+0800) Manila, Philippines</option>
  <option value="Australia/Perth">(UTC+0800) Perth, Australia</option>
  <option value="Asia/Shanghai">(UTC+0800) Shanghai, China</option>
  <option value="Asia/Singapore">(UTC+0800) Singapore</option>
  <option value="Asia/Taipei">(UTC+0800) Taipei, Taiwan</option>
  <option value="Asia/Ulaanbaatar">(UTC+0800) Ulaanbaatar, Mongolia</option>
  <option value="Australia/Eucla">(UTC+0845) Eucla, Australia</option>
  <option value="Asia/Chita">(UTC+0900) Chita, Russia</option>
  <option value="Asia/Pyongyang">(UTC+0900) Pyongyang, North Korea</option>
  <option value="Asia/Dili">(UTC+0900) Díli, Timor-Leste</option>
  <option value="Asia/Jayapura">(UTC+0900) Jayapura, Indonesia</option>
  <option value="Asia/Khandyga">(UTC+0900) Khandyga, Russia</option>
  <option value="Pacific/Palau">(UTC+0900) Palau</option>
  <option value="Asia/Seoul">(UTC+0900) Seoul, South Korea</option>
  <option value="Asia/Tokyo">(UTC+0900) Tokyo, Japan</option>
  <option value="Asia/Yakutsk">(UTC+0900) Yakutsk, Russia</option>
  <option value="Australia/Darwin">(UTC+0930) Darwin, Australia</option>
  <option value="Australia/Brisbane">(UTC+1000) Brisbane, Australia</option>
  <option value="Pacific/Chuuk">(UTC+1000) Chuuk, Federated States of Micronesia</option>
  <option value="Antarctica/DumontDUrville">(UTC+1000) Dumont d'Urville Station, Antarctica</option>
  <option value="Pacific/Guam">(UTC+1000) Guam</option>
  <option value="Australia/Lindeman">(UTC+1000) Lindeman Island, Australia</option>
  <option value="Pacific/Port_Moresby">(UTC+1000) Port Moresby, Papua New Guinea</option>
  <option value="Pacific/Saipan">(UTC+1000) Saipan, Northern Mariana Islands</option>
  <option value="Asia/Ust-Nera">(UTC+1000) Ust-Nera, Russia</option>
  <option value="Asia/Vladivostok">(UTC+1000) Vladivostok, Russia</option>
  <option value="Australia/Adelaide">(UTC+1030) Adelaide, Australia</option>
  <option value="Australia/Broken_Hill">(UTC+1030) Broken Hill, Australia</option>
  <option value="Asia/Magadan">(UTC+1100) Magadan, Russia</option>
  <option value="Asia/Sakhalin">(UTC+1100) Sakhalin, Russia</option>
  <option value="Australia/Lord_Howe">(UTC+1100) Lord Howe Island, Australia</option>
  <option value="Pacific/Bougainville">(UTC+1100) Bougainville Island, Papua New Guinea</option>
  <option value="Australia/Currie">(UTC+1100) Currie, Australia</option>
  <option value="Pacific/Efate">(UTC+1100) Efate, Vanuatu</option>
  <option value="Pacific/Guadalcanal">(UTC+1100) Guadalcanal, Solomon Islands</option>
  <option value="Australia/Hobart">(UTC+1100) Hobart, Australia</option>
  <option value="Pacific/Kosrae">(UTC+1100) Kosrae, Federated States of Micronesia</option>
  <option value="Antarctica/Macquarie">(UTC+1100) Macquarie Island, Australia</option>
  <option value="Australia/Melbourne">(UTC+1100) Melbourne, Australia</option>
  <option value="Pacific/Norfolk">(UTC+1100) Norfolk Island</option>
  <option value="Pacific/Noumea">(UTC+1100) Noumea, New Caledonia</option>
  <option value="Pacific/Pohnpei">(UTC+1100) Pohnpei, Federated States of Micronesia</option>
  <option value="Asia/Srednekolymsk">(UTC+1100) Srednekolymsk, Russia</option>
  <option value="Australia/Sydney">(UTC+1100) Sydney, Australia</option>
  <option value="Asia/Anadyr">(UTC+1200) Anadyr, Russia</option>
  <option value="Pacific/Funafuti">(UTC+1200) Funafuti, Tuvalu</option>
  <option value="Asia/Kamchatka">(UTC+1200) Kamchatka Peninsula, Russia</option>
  <option value="Pacific/Kwajalein">(UTC+1200) Kwajalein Atoll, Marshall Islands</option>
  <option value="Pacific/Majuro">(UTC+1200) Majuro, Marshall Islands</option>
  <option value="Pacific/Nauru">(UTC+1200) Nauru</option>
  <option value="Pacific/Tarawa">(UTC+1200) Tarawa Atoll, Kiribati</option>
  <option value="Pacific/Wake">(UTC+1200) Wake Island, United States</option>
  <option value="Pacific/Wallis">(UTC+1200) Wallis Island, Wallis and Futuna</option>
  <option value="Pacific/Fiji">(UTC+1200) Suva, Fiji</option>
  <option value="Pacific/Auckland">(UTC+1300) Auckland, New Zealand</option>
  <option value="Pacific/Enderbury">(UTC+1300) Enderbury Island, Kiribati</option>
  <option value="Pacific/Fakaofo">(UTC+1300) Fakaofo, Tokelau</option>
  <option value="Antarctica/McMurdo">(UTC+1300) McMurdo Station, Antarctica</option>
  <option value="Pacific/Tongatapu">(UTC+1300) Tongatapu, Tonga</option>
  <option value="Pacific/Chatham">(UTC+1345) Chatham Islands, New Zealand</option>
  <option value="Pacific/Apia">(UTC+1400) Apia, Samoa</option>
  <option value="Pacific/Kiritimati">(UTC+1400) Kiritimati, Kiribati</option>
</select>

Exec Time: 26.19 msec
*/

Get information on given time zone:

use peterkahl\timeZones\timeZones;

$temp = timeZones::getInfo('Africa/Sao_Tome');
var_dump($temp);

/*
array(4) {
  [0]=>
  string(15) "Africa/Sao_Tome"
  [1]=>
  int(0)
  [2]=>
  string(6) "+0000"
  [3]=>
  string(24) "São Tomé and Príncipe"
}
*/

$temp = timeZones::getInfo('Asia/Ulaanbaatar');
var_dump($temp);

/*
array(4) {
  [0]=>
  string(16) "Asia/Ulaanbaatar"
  [1]=>
  int(28800)
  [2]=>
  string(6) "+0800"
  [3]=>
  string(21) "Ulaanbaatar, Mongolia"
}
*/

Two alternative time zone libraries available!

I have created two alternative timezone libraries and you should consider using them.

This MySQL-based library is bit more complex, more versatile and more powerful:

https://github.com/peterkahl/TimeZoneCity

The other a replacement for the PHP date() function in that it provides timezone abbreviations and fully spelled out zone names:

https://github.com/peterkahl/WorldTime