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The default timezone for PHP is UTC regardless of your server's timezone. This is the timezone used by all PHP date/time functions in your scripts. See PHP's list of supported timezones to find the names of all possible timezones you can use for the date.
(GMT-5:00) Eastern Time (US & Canada)Add the local time offset to the UTC time. For example, if your local time offset is -5:00, and if the UTC time is shown as 11:00, add -5 to 11. The time setting when adjusted for offset is 06:00 (6:00 A.M.). Note The date also follows UTC format.
The date_default_timezone_set() function sets the default timezone used by all date/time functions in the script.
The problem is that you're displaying time(), which is a UNIX timestamp based on GMT/UTC. That’s why it doesn’t change. date() on the other hand, formats the time based on that timestamp.
A timestamp is the number of seconds since the Unix Epoch (January 1 1970 00:00:00 GMT).
echo date('Y-m-d H:i:s T', time()) . "<br>\n";
date_default_timezone_set('UTC');
echo date('Y-m-d H:i:s T', time()) . "<br>\n";
UTC is definitely a valid timezone. It is simply an abbreviation for Coordinated Universal Time. In addition, remember that date_default_timezone_set accepts one of the following values:
$timezones=array(
"America/Adak",
"America/Argentina/Buenos_Aires",
"America/Argentina/La_Rioja",
"America/Argentina/San_Luis",
"America/Atikokan",
"America/Belem",
"America/Boise",
"America/Caracas",
"America/Chihuahua",
"America/Cuiaba",
"America/Denver",
"America/El_Salvador",
"America/Godthab",
"America/Guatemala",
"America/Hermosillo",
"America/Indiana/Tell_City",
"America/Inuvik",
"America/Kentucky/Louisville",
"America/Lima",
"America/Managua",
"America/Mazatlan",
"America/Mexico_City",
"America/Montreal",
"America/Nome",
"America/Ojinaga",
"America/Port-au-Prince",
"America/Rainy_River",
"America/Rio_Branco",
"America/Santo_Domingo",
"America/St_Barthelemy",
"America/St_Vincent",
"America/Tijuana",
"America/Whitehorse",
"America/Anchorage",
"America/Argentina/Catamarca",
"America/Argentina/Mendoza",
"America/Argentina/Tucuman",
"America/Atka",
"America/Belize",
"America/Buenos_Aires",
"America/Catamarca",
"America/Coral_Harbour",
"America/Curacao",
"America/Detroit",
"America/Ensenada",
"America/Goose_Bay",
"America/Guayaquil",
"America/Indiana/Indianapolis",
"America/Indiana/Vevay",
"America/Iqaluit",
"America/Kentucky/Monticello",
"America/Los_Angeles",
"America/Manaus",
"America/Mendoza",
"America/Miquelon",
"America/Montserrat",
"America/Noronha",
"America/Panama",
"America/Port_of_Spain",
"America/Rankin_Inlet",
"America/Rosario",
"America/Sao_Paulo",
"America/St_Johns",
"America/Swift_Current",
"America/Toronto",
"America/Winnipeg",
"America/Anguilla",
"America/Argentina/ComodRivadavia",
"America/Argentina/Rio_Gallegos",
"America/Argentina/Ushuaia",
"America/Bahia",
"America/Blanc-Sablon",
"America/Cambridge_Bay",
"America/Cayenne",
"America/Cordoba",
"America/Danmarkshavn",
"America/Dominica",
"America/Fort_Wayne",
"America/Grand_Turk",
"America/Guyana",
"America/Indiana/Knox",
"America/Indiana/Vincennes",
"America/Jamaica",
"America/Knox_IN",
"America/Louisville",
"America/Marigot",
"America/Menominee",
"America/Moncton",
"America/Nassau",
"America/North_Dakota/Beulah",
"America/Pangnirtung",
"America/Porto_Acre",
"America/Recife",
"America/Santa_Isabel",
"America/Scoresbysund",
"America/St_Kitts",
"America/Tegucigalpa",
"America/Tortola",
"America/Yakutat",
"America/Antigua",
"America/Argentina/Cordoba",
"America/Argentina/Salta",
"America/Aruba",
"America/Bahia_Banderas",
"America/Boa_Vista",
"America/Campo_Grande",
"America/Cayman",
"America/Costa_Rica",
"America/Dawson",
"America/Edmonton",
"America/Fortaleza",
"America/Grenada",
"America/Halifax",
"America/Indiana/Marengo",
"America/Indiana/Winamac",
"America/Jujuy",
"America/Kralendijk",
"America/Lower_Princes",
"America/Martinique",
"America/Merida",
"America/Monterrey",
"America/New_York",
"America/North_Dakota/Center",
"America/Paramaribo",
"America/Porto_Velho",
"America/Regina",
"America/Santarem",
"America/Shiprock",
"America/St_Lucia",
"America/Thule",
"America/Vancouver",
"America/Yellowknife",
"America/Araguaina",
"America/Argentina/Jujuy",
"America/Argentina/San_Juan",
"America/Asuncion",
"America/Barbados",
"America/Bogota",
"America/Cancun",
"America/Chicago",
"America/Creston",
"America/Dawson_Creek",
"America/Eirunepe",
"America/Glace_Bay",
"America/Guadeloupe",
"America/Havana",
"America/Indiana/Petersburg",
"America/Indianapolis",
"America/Juneau",
"America/La_Paz",
"America/Maceio",
"America/Matamoros",
"America/Metlakatla",
"America/Montevideo",
"America/Nipigon",
"America/North_Dakota/New_Salem",
"America/Phoenix",
"America/Puerto_Rico",
"America/Resolute",
"America/Santiago",
"America/Sitka",
"America/St_Thomas",
"America/Thunder_Bay",
"America/Virgin",
"Indian/Antananarivo",
"Indian/Kerguelen",
"Indian/Reunion",
"Australia/ACT",
"Australia/Currie",
"Australia/Lindeman",
"Australia/Perth",
"Australia/Victoria",
"Europe/Amsterdam",
"Europe/Berlin",
"Europe/Chisinau",
"Europe/Helsinki",
"Europe/Kiev",
"Europe/Madrid",
"Europe/Moscow",
"Europe/Prague",
"Europe/Sarajevo",
"Europe/Tallinn",
"Europe/Vatican",
"Europe/Zagreb",
"Pacific/Apia",
"Pacific/Efate",
"Pacific/Galapagos",
"Pacific/Johnston",
"Pacific/Marquesas",
"Pacific/Noumea",
"Pacific/Ponape",
"Pacific/Tahiti",
"Pacific/Wallis",
"Indian/Chagos",
"Indian/Mahe",
"Australia/Adelaide",
"Australia/Darwin",
"Australia/Lord_Howe",
"Australia/Queensland",
"Australia/West",
"Europe/Andorra",
"Europe/Bratislava",
"Europe/Copenhagen",
"Europe/Isle_of_Man",
"Europe/Lisbon",
"Europe/Malta",
"Europe/Nicosia",
"Europe/Riga",
"Europe/Simferopol",
"Europe/Tirane",
"Europe/Vienna",
"Europe/Zaporozhye",
"Pacific/Auckland",
"Pacific/Enderbury",
"Pacific/Gambier",
"Pacific/Kiritimati",
"Pacific/Midway",
"Pacific/Pago_Pago",
"Pacific/Port_Moresby",
"Pacific/Tarawa",
"Pacific/Yap",
"Africa/Abidjan",
"Africa/Asmera",
"Africa/Blantyre",
"Africa/Ceuta",
"Africa/Douala",
"Africa/Johannesburg",
"Africa/Kinshasa",
"Africa/Lubumbashi",
"Africa/Mbabane",
"Africa/Niamey",
"Africa/Timbuktu",
"Africa/Accra",
"Africa/Bamako",
"Africa/Brazzaville",
"Africa/Conakry",
"Africa/El_Aaiun",
"Africa/Juba",
"Africa/Lagos",
"Africa/Lusaka",
"Africa/Mogadishu",
"Africa/Nouakchott",
"Africa/Tripoli",
"Africa/Addis_Ababa",
"Africa/Bangui",
"Africa/Bujumbura",
"Africa/Dakar",
"Africa/Freetown",
"Africa/Kampala",
"Africa/Libreville",
"Africa/Malabo",
"Africa/Monrovia",
"Africa/Ouagadougou",
"Africa/Tunis",
"Africa/Algiers",
"Africa/Banjul",
"Africa/Cairo",
"Africa/Dar_es_Salaam",
"Africa/Gaborone",
"Africa/Khartoum",
"Africa/Lome",
"Africa/Maputo",
"Africa/Nairobi",
"Africa/Porto-Novo",
"Africa/Windhoek",
"Africa/Asmara",
"Africa/Bissau",
"Africa/Casablanca",
"Africa/Djibouti",
"Africa/Harare",
"Africa/Kigali",
"Africa/Luanda",
"Africa/Maseru",
"Africa/Ndjamena",
"Africa/Sao_Tome",
"Atlantic/Azores",
"Atlantic/Faroe",
"Atlantic/St_Helena",
"Atlantic/Bermuda",
"Atlantic/Jan_Mayen",
"Atlantic/Stanley",
"Atlantic/Canary",
"Atlantic/Madeira",
"Atlantic/Cape_Verde",
"Atlantic/Reykjavik",
"Atlantic/Faeroe",
"Atlantic/South_Georgia",
"Asia/Aden",
"Asia/Aqtobe",
"Asia/Baku",
"Asia/Calcutta",
"Asia/Dacca",
"Asia/Dushanbe",
"Asia/Hong_Kong",
"Asia/Jayapura",
"Asia/Kashgar",
"Asia/Kuala_Lumpur",
"Asia/Magadan",
"Asia/Novokuznetsk",
"Asia/Pontianak",
"Asia/Riyadh",
"Asia/Shanghai",
"Asia/Tehran",
"Asia/Ujung_Pandang",
"Asia/Vladivostok",
"Asia/Almaty",
"Asia/Ashgabat",
"Asia/Bangkok",
"Asia/Choibalsan",
"Asia/Damascus",
"Asia/Gaza",
"Asia/Hovd",
"Asia/Jerusalem",
"Asia/Kathmandu",
"Asia/Kuching",
"Asia/Makassar",
"Asia/Novosibirsk",
"Asia/Pyongyang",
"Asia/Saigon",
"Asia/Singapore",
"Asia/Tel_Aviv",
"Asia/Ulaanbaatar",
"Asia/Yakutsk",
"Asia/Amman",
"Asia/Ashkhabad",
"Asia/Beirut",
"Asia/Chongqing",
"Asia/Dhaka",
"Asia/Harbin",
"Asia/Irkutsk",
"Asia/Kabul",
"Asia/Katmandu",
"Asia/Kuwait",
"Asia/Manila",
"Asia/Omsk",
"Asia/Qatar",
"Asia/Sakhalin",
"Asia/Taipei",
"Asia/Thimbu",
"Asia/Ulan_Bator",
"Asia/Yekaterinburg",
"Asia/Anadyr",
"Asia/Baghdad",
"Asia/Bishkek",
"Asia/Chungking",
"Asia/Dili",
"Asia/Hebron",
"Asia/Istanbul",
"Asia/Kamchatka",
"Asia/Kolkata",
"Asia/Macao",
"Asia/Muscat",
"Asia/Oral",
"Asia/Qyzylorda",
"Asia/Samarkand",
"Asia/Tashkent",
"Asia/Thimphu",
"Asia/Urumqi",
"Asia/Yerevan",
"Asia/Aqtau",
"Asia/Bahrain",
"Asia/Brunei",
"Asia/Colombo",
"Asia/Dubai",
"Asia/Ho_Chi_Minh",
"Asia/Jakarta",
"Asia/Karachi",
"Asia/Krasnoyarsk",
"Asia/Macau",
"Asia/Nicosia",
"Asia/Phnom_Penh",
"Asia/Rangoon",
"Asia/Seoul",
"Asia/Tbilisi",
"Asia/Tokyo",
"Asia/Vientiane",
"Australia/Canberra",
"Australia/LHI",
"Australia/NSW",
"Australia/Tasmania",
"Australia/Broken_Hill",
"Australia/Hobart",
"Australia/North",
"Australia/Sydney",
"Pacific/Chuuk",
"Pacific/Fiji",
"Pacific/Guam",
"Pacific/Kwajalein",
"Pacific/Niue",
"Pacific/Pitcairn",
"Pacific/Saipan",
"Pacific/Truk",
"Pacific/Chatham",
"Pacific/Fakaofo",
"Pacific/Guadalcanal",
"Pacific/Kosrae",
"Pacific/Nauru",
"Pacific/Palau",
"Pacific/Rarotonga",
"Pacific/Tongatapu",
"Pacific/Easter",
"Pacific/Funafuti",
"Pacific/Honolulu",
"Pacific/Majuro",
"Pacific/Norfolk",
"Pacific/Pohnpei",
"Pacific/Samoa",
"Pacific/Wake",
"Antarctica/Casey",
"Antarctica/McMurdo",
"Antarctica/Vostok",
"Antarctica/Davis",
"Antarctica/Palmer",
"Antarctica/DumontDUrville",
"Antarctica/Rothera",
"Antarctica/Macquarie",
"Antarctica/South_Pole",
"Antarctica/Mawson",
"Antarctica/Syowa",
"Arctic/Longyearbyen",
"Europe/Athens",
"Europe/Brussels",
"Europe/Dublin",
"Europe/Istanbul",
"Europe/Ljubljana",
"Europe/Mariehamn",
"Europe/Oslo",
"Europe/Rome",
"Europe/Skopje",
"Europe/Tiraspol",
"Europe/Vilnius",
"Europe/Zurich",
"Europe/Belfast",
"Europe/Bucharest",
"Europe/Gibraltar",
"Europe/Jersey",
"Europe/London",
"Europe/Minsk",
"Europe/Paris",
"Europe/Samara",
"Europe/Sofia",
"Europe/Uzhgorod",
"Europe/Volgograd",
"Europe/Belgrade",
"Europe/Budapest",
"Europe/Guernsey",
"Europe/Kaliningrad",
"Europe/Luxembourg",
"Europe/Monaco",
"Europe/Podgorica",
"Europe/San_Marino",
"Europe/Stockholm",
"Europe/Vaduz",
"Europe/Warsaw",
"Indian/Cocos",
"Indian/Mauritius",
"Indian/Christmas",
"Indian/Maldives",
"Indian/Comoro",
"Indian/Mayotte",
"Australia/Brisbane",
"Australia/Eucla",
"Australia/Melbourne",
"Australia/South",
"Australia/Yancowinna",
);
Timezones in PHP at http://www.php.net/manual/en/timezones.php
List of entire available timezones.
$time_zones = array (
0 => 'Africa/Abidjan',
1 => 'Africa/Accra',
2 => 'Africa/Addis_Ababa',
3 => 'Africa/Algiers',
4 => 'Africa/Asmara',
5 => 'Africa/Asmera',
6 => 'Africa/Bamako',
7 => 'Africa/Bangui',
8 => 'Africa/Banjul',
9 => 'Africa/Bissau',
10 => 'Africa/Blantyre',
11 => 'Africa/Brazzaville',
12 => 'Africa/Bujumbura',
13 => 'Africa/Cairo',
14 => 'Africa/Casablanca',
15 => 'Africa/Ceuta',
16 => 'Africa/Conakry',
17 => 'Africa/Dakar',
18 => 'Africa/Dar_es_Salaam',
19 => 'Africa/Djibouti',
20 => 'Africa/Douala',
21 => 'Africa/El_Aaiun',
22 => 'Africa/Freetown',
23 => 'Africa/Gaborone',
24 => 'Africa/Harare',
25 => 'Africa/Johannesburg',
26 => 'Africa/Juba',
27 => 'Africa/Kampala',
28 => 'Africa/Khartoum',
29 => 'Africa/Kigali',
30 => 'Africa/Kinshasa',
31 => 'Africa/Lagos',
32 => 'Africa/Libreville',
33 => 'Africa/Lome',
34 => 'Africa/Luanda',
35 => 'Africa/Lubumbashi',
36 => 'Africa/Lusaka',
37 => 'Africa/Malabo',
38 => 'Africa/Maputo',
39 => 'Africa/Maseru',
40 => 'Africa/Mbabane',
41 => 'Africa/Mogadishu',
42 => 'Africa/Monrovia',
43 => 'Africa/Nairobi',
44 => 'Africa/Ndjamena',
45 => 'Africa/Niamey',
46 => 'Africa/Nouakchott',
47 => 'Africa/Ouagadougou',
48 => 'Africa/Porto-Novo',
49 => 'Africa/Sao_Tome',
50 => 'Africa/Timbuktu',
51 => 'Africa/Tripoli',
52 => 'Africa/Tunis',
53 => 'Africa/Windhoek',
54 => 'America/Adak',
55 => 'America/Anchorage',
56 => 'America/Anguilla',
57 => 'America/Antigua',
58 => 'America/Araguaina',
59 => 'America/Argentina/Buenos_Aires',
60 => 'America/Argentina/Catamarca',
61 => 'America/Argentina/ComodRivadavia',
62 => 'America/Argentina/Cordoba',
63 => 'America/Argentina/Jujuy',
64 => 'America/Argentina/La_Rioja',
65 => 'America/Argentina/Mendoza',
66 => 'America/Argentina/Rio_Gallegos',
67 => 'America/Argentina/Salta',
68 => 'America/Argentina/San_Juan',
69 => 'America/Argentina/San_Luis',
70 => 'America/Argentina/Tucuman',
71 => 'America/Argentina/Ushuaia',
72 => 'America/Aruba',
73 => 'America/Asuncion',
74 => 'America/Atikokan',
75 => 'America/Atka',
76 => 'America/Bahia',
77 => 'America/Bahia_Banderas',
78 => 'America/Barbados',
79 => 'America/Belem',
80 => 'America/Belize',
81 => 'America/Blanc-Sablon',
82 => 'America/Boa_Vista',
83 => 'America/Bogota',
84 => 'America/Boise',
85 => 'America/Buenos_Aires',
86 => 'America/Cambridge_Bay',
87 => 'America/Campo_Grande',
88 => 'America/Cancun',
89 => 'America/Caracas',
90 => 'America/Catamarca',
91 => 'America/Cayenne',
92 => 'America/Cayman',
93 => 'America/Chicago',
94 => 'America/Chihuahua',
95 => 'America/Coral_Harbour',
96 => 'America/Cordoba',
97 => 'America/Costa_Rica',
98 => 'America/Creston',
99 => 'America/Cuiaba',
100 => 'America/Curacao',
101 => 'America/Danmarkshavn',
102 => 'America/Dawson',
103 => 'America/Dawson_Creek',
104 => 'America/Denver',
105 => 'America/Detroit',
106 => 'America/Dominica',
107 => 'America/Edmonton',
108 => 'America/Eirunepe',
109 => 'America/El_Salvador',
110 => 'America/Ensenada',
111 => 'America/Fort_Nelson',
112 => 'America/Fort_Wayne',
113 => 'America/Fortaleza',
114 => 'America/Glace_Bay',
115 => 'America/Godthab',
116 => 'America/Goose_Bay',
117 => 'America/Grand_Turk',
118 => 'America/Grenada',
119 => 'America/Guadeloupe',
120 => 'America/Guatemala',
121 => 'America/Guayaquil',
122 => 'America/Guyana',
123 => 'America/Halifax',
124 => 'America/Havana',
125 => 'America/Hermosillo',
126 => 'America/Indiana/Indianapolis',
127 => 'America/Indiana/Knox',
128 => 'America/Indiana/Marengo',
129 => 'America/Indiana/Petersburg',
130 => 'America/Indiana/Tell_City',
131 => 'America/Indiana/Vevay',
132 => 'America/Indiana/Vincennes',
133 => 'America/Indiana/Winamac',
134 => 'America/Indianapolis',
135 => 'America/Inuvik',
136 => 'America/Iqaluit',
137 => 'America/Jamaica',
138 => 'America/Jujuy',
139 => 'America/Juneau',
140 => 'America/Kentucky/Louisville',
141 => 'America/Kentucky/Monticello',
142 => 'America/Knox_IN',
143 => 'America/Kralendijk',
144 => 'America/La_Paz',
145 => 'America/Lima',
146 => 'America/Los_Angeles',
147 => 'America/Louisville',
148 => 'America/Lower_Princes',
149 => 'America/Maceio',
150 => 'America/Managua',
151 => 'America/Manaus',
152 => 'America/Marigot',
153 => 'America/Martinique',
154 => 'America/Matamoros',
155 => 'America/Mazatlan',
156 => 'America/Mendoza',
157 => 'America/Menominee',
158 => 'America/Merida',
159 => 'America/Metlakatla',
160 => 'America/Mexico_City',
161 => 'America/Miquelon',
162 => 'America/Moncton',
163 => 'America/Monterrey',
164 => 'America/Montevideo',
165 => 'America/Montreal',
166 => 'America/Montserrat',
167 => 'America/Nassau',
168 => 'America/New_York',
169 => 'America/Nipigon',
170 => 'America/Nome',
171 => 'America/Noronha',
172 => 'America/North_Dakota/Beulah',
173 => 'America/North_Dakota/Center',
174 => 'America/North_Dakota/New_Salem',
175 => 'America/Ojinaga',
176 => 'America/Panama',
177 => 'America/Pangnirtung',
178 => 'America/Paramaribo',
179 => 'America/Phoenix',
180 => 'America/Port-au-Prince',
181 => 'America/Port_of_Spain',
182 => 'America/Porto_Acre',
183 => 'America/Porto_Velho',
184 => 'America/Puerto_Rico',
185 => 'America/Rainy_River',
186 => 'America/Rankin_Inlet',
187 => 'America/Recife',
188 => 'America/Regina',
189 => 'America/Resolute',
190 => 'America/Rio_Branco',
191 => 'America/Rosario',
192 => 'America/Santa_Isabel',
193 => 'America/Santarem',
194 => 'America/Santiago',
195 => 'America/Santo_Domingo',
196 => 'America/Sao_Paulo',
197 => 'America/Scoresbysund',
198 => 'America/Shiprock',
199 => 'America/Sitka',
200 => 'America/St_Barthelemy',
201 => 'America/St_Johns',
202 => 'America/St_Kitts',
203 => 'America/St_Lucia',
204 => 'America/St_Thomas',
205 => 'America/St_Vincent',
206 => 'America/Swift_Current',
207 => 'America/Tegucigalpa',
208 => 'America/Thule',
209 => 'America/Thunder_Bay',
210 => 'America/Tijuana',
211 => 'America/Toronto',
212 => 'America/Tortola',
213 => 'America/Vancouver',
214 => 'America/Virgin',
215 => 'America/Whitehorse',
216 => 'America/Winnipeg',
217 => 'America/Yakutat',
218 => 'America/Yellowknife',
219 => 'Antarctica/Casey',
220 => 'Antarctica/Davis',
221 => 'Antarctica/DumontDUrville',
222 => 'Antarctica/Macquarie',
223 => 'Antarctica/Mawson',
224 => 'Antarctica/McMurdo',
225 => 'Antarctica/Palmer',
226 => 'Antarctica/Rothera',
227 => 'Antarctica/South_Pole',
228 => 'Antarctica/Syowa',
229 => 'Antarctica/Troll',
230 => 'Antarctica/Vostok',
231 => 'Arctic/Longyearbyen',
232 => 'Asia/Aden',
233 => 'Asia/Almaty',
234 => 'Asia/Amman',
235 => 'Asia/Anadyr',
236 => 'Asia/Aqtau',
237 => 'Asia/Aqtobe',
238 => 'Asia/Ashgabat',
239 => 'Asia/Ashkhabad',
240 => 'Asia/Baghdad',
241 => 'Asia/Bahrain',
242 => 'Asia/Baku',
243 => 'Asia/Bangkok',
244 => 'Asia/Beirut',
245 => 'Asia/Bishkek',
246 => 'Asia/Brunei',
247 => 'Asia/Calcutta',
248 => 'Asia/Chita',
249 => 'Asia/Choibalsan',
250 => 'Asia/Chongqing',
251 => 'Asia/Chungking',
252 => 'Asia/Colombo',
253 => 'Asia/Dacca',
254 => 'Asia/Damascus',
255 => 'Asia/Dhaka',
256 => 'Asia/Dili',
257 => 'Asia/Dubai',
258 => 'Asia/Dushanbe',
259 => 'Asia/Gaza',
260 => 'Asia/Harbin',
261 => 'Asia/Hebron',
262 => 'Asia/Ho_Chi_Minh',
263 => 'Asia/Hong_Kong',
264 => 'Asia/Hovd',
265 => 'Asia/Irkutsk',
266 => 'Asia/Istanbul',
267 => 'Asia/Jakarta',
268 => 'Asia/Jayapura',
269 => 'Asia/Jerusalem',
270 => 'Asia/Kabul',
271 => 'Asia/Kamchatka',
272 => 'Asia/Karachi',
273 => 'Asia/Kashgar',
274 => 'Asia/Kathmandu',
275 => 'Asia/Katmandu',
276 => 'Asia/Khandyga',
277 => 'Asia/Kolkata',
278 => 'Asia/Krasnoyarsk',
279 => 'Asia/Kuala_Lumpur',
280 => 'Asia/Kuching',
281 => 'Asia/Kuwait',
282 => 'Asia/Macao',
283 => 'Asia/Macau',
284 => 'Asia/Magadan',
285 => 'Asia/Makassar',
286 => 'Asia/Manila',
287 => 'Asia/Muscat',
288 => 'Asia/Nicosia',
289 => 'Asia/Novokuznetsk',
290 => 'Asia/Novosibirsk',
291 => 'Asia/Omsk',
292 => 'Asia/Oral',
293 => 'Asia/Phnom_Penh',
294 => 'Asia/Pontianak',
295 => 'Asia/Pyongyang',
296 => 'Asia/Qatar',
297 => 'Asia/Qyzylorda',
298 => 'Asia/Rangoon',
299 => 'Asia/Riyadh',
300 => 'Asia/Saigon',
301 => 'Asia/Sakhalin',
302 => 'Asia/Samarkand',
303 => 'Asia/Seoul',
304 => 'Asia/Shanghai',
305 => 'Asia/Singapore',
306 => 'Asia/Srednekolymsk',
307 => 'Asia/Taipei',
308 => 'Asia/Tashkent',
309 => 'Asia/Tbilisi',
310 => 'Asia/Tehran',
311 => 'Asia/Tel_Aviv',
312 => 'Asia/Thimbu',
313 => 'Asia/Thimphu',
314 => 'Asia/Tokyo',
315 => 'Asia/Ujung_Pandang',
316 => 'Asia/Ulaanbaatar',
317 => 'Asia/Ulan_Bator',
318 => 'Asia/Urumqi',
319 => 'Asia/Ust-Nera',
320 => 'Asia/Vientiane',
321 => 'Asia/Vladivostok',
322 => 'Asia/Yakutsk',
323 => 'Asia/Yekaterinburg',
324 => 'Asia/Yerevan',
325 => 'Atlantic/Azores',
326 => 'Atlantic/Bermuda',
327 => 'Atlantic/Canary',
328 => 'Atlantic/Cape_Verde',
329 => 'Atlantic/Faeroe',
330 => 'Atlantic/Faroe',
331 => 'Atlantic/Jan_Mayen',
332 => 'Atlantic/Madeira',
333 => 'Atlantic/Reykjavik',
334 => 'Atlantic/South_Georgia',
335 => 'Atlantic/St_Helena',
336 => 'Atlantic/Stanley',
337 => 'Australia/ACT',
338 => 'Australia/Adelaide',
339 => 'Australia/Brisbane',
340 => 'Australia/Broken_Hill',
341 => 'Australia/Canberra',
342 => 'Australia/Currie',
343 => 'Australia/Darwin',
344 => 'Australia/Eucla',
345 => 'Australia/Hobart',
346 => 'Australia/LHI',
347 => 'Australia/Lindeman',
348 => 'Australia/Lord_Howe',
349 => 'Australia/Melbourne',
350 => 'Australia/North',
351 => 'Australia/NSW',
352 => 'Australia/Perth',
353 => 'Australia/Queensland',
354 => 'Australia/South',
355 => 'Australia/Sydney',
356 => 'Australia/Tasmania',
357 => 'Australia/Victoria',
358 => 'Australia/West',
359 => 'Australia/Yancowinna',
360 => 'Europe/Amsterdam',
361 => 'Europe/Andorra',
362 => 'Europe/Athens',
363 => 'Europe/Belfast',
364 => 'Europe/Belgrade',
365 => 'Europe/Berlin',
366 => 'Europe/Bratislava',
367 => 'Europe/Brussels',
368 => 'Europe/Bucharest',
369 => 'Europe/Budapest',
370 => 'Europe/Busingen',
371 => 'Europe/Chisinau',
372 => 'Europe/Copenhagen',
373 => 'Europe/Dublin',
374 => 'Europe/Gibraltar',
375 => 'Europe/Guernsey',
376 => 'Europe/Helsinki',
377 => 'Europe/Isle_of_Man',
378 => 'Europe/Istanbul',
379 => 'Europe/Jersey',
380 => 'Europe/Kaliningrad',
381 => 'Europe/Kiev',
382 => 'Europe/Lisbon',
383 => 'Europe/Ljubljana',
384 => 'Europe/London',
385 => 'Europe/Luxembourg',
386 => 'Europe/Madrid',
387 => 'Europe/Malta',
388 => 'Europe/Mariehamn',
389 => 'Europe/Minsk',
390 => 'Europe/Monaco',
391 => 'Europe/Moscow',
392 => 'Europe/Nicosia',
393 => 'Europe/Oslo',
394 => 'Europe/Paris',
395 => 'Europe/Podgorica',
396 => 'Europe/Prague',
397 => 'Europe/Riga',
398 => 'Europe/Rome',
399 => 'Europe/Samara',
400 => 'Europe/San_Marino',
401 => 'Europe/Sarajevo',
402 => 'Europe/Simferopol',
403 => 'Europe/Skopje',
404 => 'Europe/Sofia',
405 => 'Europe/Stockholm',
406 => 'Europe/Tallinn',
407 => 'Europe/Tirane',
408 => 'Europe/Tiraspol',
409 => 'Europe/Uzhgorod',
410 => 'Europe/Vaduz',
411 => 'Europe/Vatican',
412 => 'Europe/Vienna',
413 => 'Europe/Vilnius',
414 => 'Europe/Volgograd',
415 => 'Europe/Warsaw',
416 => 'Europe/Zagreb',
417 => 'Europe/Zaporozhye',
418 => 'Europe/Zurich',
419 => 'Indian/Antananarivo',
420 => 'Indian/Chagos',
421 => 'Indian/Christmas',
422 => 'Indian/Cocos',
423 => 'Indian/Comoro',
424 => 'Indian/Kerguelen',
425 => 'Indian/Mahe',
426 => 'Indian/Maldives',
427 => 'Indian/Mauritius',
428 => 'Indian/Mayotte',
429 => 'Indian/Reunion',
430 => 'Pacific/Apia',
431 => 'Pacific/Auckland',
432 => 'Pacific/Bougainville',
433 => 'Pacific/Chatham',
434 => 'Pacific/Chuuk',
435 => 'Pacific/Easter',
436 => 'Pacific/Efate',
437 => 'Pacific/Enderbury',
438 => 'Pacific/Fakaofo',
439 => 'Pacific/Fiji',
440 => 'Pacific/Funafuti',
441 => 'Pacific/Galapagos',
442 => 'Pacific/Gambier',
443 => 'Pacific/Guadalcanal',
444 => 'Pacific/Guam',
445 => 'Pacific/Honolulu',
446 => 'Pacific/Johnston',
447 => 'Pacific/Kiritimati',
448 => 'Pacific/Kosrae',
449 => 'Pacific/Kwajalein',
450 => 'Pacific/Majuro',
451 => 'Pacific/Marquesas',
452 => 'Pacific/Midway',
453 => 'Pacific/Nauru',
454 => 'Pacific/Niue',
455 => 'Pacific/Norfolk',
456 => 'Pacific/Noumea',
457 => 'Pacific/Pago_Pago',
458 => 'Pacific/Palau',
459 => 'Pacific/Pitcairn',
460 => 'Pacific/Pohnpei',
461 => 'Pacific/Ponape',
462 => 'Pacific/Port_Moresby',
463 => 'Pacific/Rarotonga',
464 => 'Pacific/Saipan',
465 => 'Pacific/Samoa',
466 => 'Pacific/Tahiti',
467 => 'Pacific/Tarawa',
468 => 'Pacific/Tongatapu',
469 => 'Pacific/Truk',
470 => 'Pacific/Wake',
471 => 'Pacific/Wallis',
472 => 'Pacific/Yap',
473 => 'Brazil/Acre',
474 => 'Brazil/DeNoronha',
475 => 'Brazil/East',
476 => 'Brazil/West',
477 => 'Canada/Atlantic',
478 => 'Canada/Central',
479 => 'Canada/East-Saskatchewan',
480 => 'Canada/Eastern',
481 => 'Canada/Mountain',
482 => 'Canada/Newfoundland',
483 => 'Canada/Pacific',
484 => 'Canada/Saskatchewan',
485 => 'Canada/Yukon',
486 => 'CET',
487 => 'Chile/Continental',
488 => 'Chile/EasterIsland',
489 => 'CST6CDT',
490 => 'Cuba',
491 => 'EET',
492 => 'Egypt',
493 => 'Eire',
494 => 'EST',
495 => 'EST5EDT',
496 => 'Etc/GMT',
497 => 'Etc/GMT+0',
498 => 'Etc/GMT+1',
499 => 'Etc/GMT+10',
500 => 'Etc/GMT+11',
501 => 'Etc/GMT+12',
502 => 'Etc/GMT+2',
503 => 'Etc/GMT+3',
504 => 'Etc/GMT+4',
505 => 'Etc/GMT+5',
506 => 'Etc/GMT+6',
507 => 'Etc/GMT+7',
508 => 'Etc/GMT+8',
509 => 'Etc/GMT+9',
510 => 'Etc/GMT-0',
511 => 'Etc/GMT-1',
512 => 'Etc/GMT-10',
513 => 'Etc/GMT-11',
514 => 'Etc/GMT-12',
515 => 'Etc/GMT-13',
516 => 'Etc/GMT-14',
517 => 'Etc/GMT-2',
518 => 'Etc/GMT-3',
519 => 'Etc/GMT-4',
520 => 'Etc/GMT-5',
521 => 'Etc/GMT-6',
522 => 'Etc/GMT-7',
523 => 'Etc/GMT-8',
524 => 'Etc/GMT-9',
525 => 'Etc/GMT0',
526 => 'Etc/Greenwich',
527 => 'Etc/UCT',
528 => 'Etc/Universal',
529 => 'Etc/UTC',
530 => 'Etc/Zulu',
531 => 'Factory',
532 => 'GB',
533 => 'GB-Eire',
534 => 'GMT',
535 => 'GMT+0',
536 => 'GMT-0',
537 => 'GMT0',
538 => 'Greenwich',
539 => 'Hongkong',
540 => 'HST',
541 => 'Iceland',
542 => 'Iran',
543 => 'Israel',
544 => 'Jamaica',
545 => 'Japan',
546 => 'Kwajalein',
547 => 'Libya',
548 => 'MET',
549 => 'Mexico/BajaNorte',
550 => 'Mexico/BajaSur',
551 => 'Mexico/General',
552 => 'MST',
553 => 'MST7MDT',
554 => 'Navajo',
555 => 'NZ',
556 => 'NZ-CHAT',
557 => 'Poland',
558 => 'Portugal',
559 => 'PRC',
560 => 'PST8PDT',
561 => 'ROC',
562 => 'ROK',
563 => 'Singapore',
564 => 'Turkey',
565 => 'UCT',
566 => 'Universal',
567 => 'US/Alaska',
568 => 'US/Aleutian',
569 => 'US/Arizona',
570 => 'US/Central',
571 => 'US/East-Indiana',
572 => 'US/Eastern',
573 => 'US/Hawaii',
574 => 'US/Indiana-Starke',
575 => 'US/Michigan',
576 => 'US/Mountain',
577 => 'US/Pacific',
578 => 'US/Pacific-New',
579 => 'US/Samoa',
580 => 'UTC',
581 => 'W-SU',
582 => 'WET',
583 => 'Zulu',
)
Is 'UTC' a valid timezone identifier on your system?
<?php
if (date_default_timezone_set('UTC')){
echo "UTC is a valid time zone";
}else{
echo "The system doesn't know WTFUTC. Maybe try updating tzinfo with your package manager?";
}
In PHP DateTime (PHP >= 5.3)
$dt = new DateTime();
$dt->setTimezone(new DateTimeZone('UTC'));
echo $dt->getTimestamp();
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