PHPKonf Istanbul PHP Conference 2019 - Call for Papers


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/Punta_Arenas 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  
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User Contributed Notes 9 notes

orem dot rodrigo at gmail dot com
3 years ago
Mirai Densetsu is wrong by saying that "America/Sao_Paulo" timezone does not exist and should be changed to "America/Brasilia".
This list is based on "Time Zone Database", maintained by Internet Assigned Numbers Authority (IANA). The location part of the name, accordingly to the naming convention, uses the "most populous city in a region to represent the entire time zone, although other cities may be selected if they are more widely known or result in a less ambiguous name".
It does not strictly consider local political divisions, because they are subject to change more than names of large cities.

This suggestion does not proceed.
eslindsey at gmail dot com
4 years ago
For the United States:

Eastern ........... America/New_York
Central ........... America/Chicago
Mountain .......... America/Denver
Mountain no DST ... America/Phoenix
Pacific ........... America/Los_Angeles
Alaska ............ America/Anchorage
Hawaii ............ America/Adak
Hawaii no DST ..... Pacific/Honolulu

opensource at matheusd dot com
2 years ago
Helpful tip for Brazilian coders in need of timezone information. Here follows the list of timezones used by each state (source:

$timezones = array(
'AC' => 'America/Rio_branco',   'AL' => 'America/Maceio',
'AP' => 'America/Belem',        'AM' => 'America/Manaus',
'BA' => 'America/Bahia',        'CE' => 'America/Fortaleza',
'DF' => 'America/Sao_Paulo',    'ES' => 'America/Sao_Paulo',
'GO' => 'America/Sao_Paulo',    'MA' => 'America/Fortaleza',
'MT' => 'America/Cuiaba',       'MS' => 'America/Campo_Grande',
'MG' => 'America/Sao_Paulo',    'PR' => 'America/Sao_Paulo',
'PB' => 'America/Fortaleza',    'PA' => 'America/Belem',
'PE' => 'America/Recife',       'PI' => 'America/Fortaleza',
'RJ' => 'America/Sao_Paulo',    'RN' => 'America/Fortaleza',
'RS' => 'America/Sao_Paulo',    'RO' => 'America/Porto_Velho',
'RR' => 'America/Boa_Vista',    'SC' => 'America/Sao_Paulo',
'SE' => 'America/Maceio',       'SP' => 'America/Sao_Paulo',
'TO' => 'America/Araguaia',    
kapahala11 at yahoo dot com
11 years ago
Note that "America" means "the continents of North and South America, including the Caribbean islands".  It does *not* mean "The United States Of America".

If you're looking for the Hawaii timezone, you'll find it in Pacific/Honolulu (not America/Honolulu).
1 year ago
I had an issue I feel pertinent to add to the conversation here in regard to running local testing servers with the likes of XAMPP.

Initially I noticed a variable I had $currentDay == date('l');
was returning the incorrect day as I tested my code which I hashed over thoroughly and found no visual errors. All the code seemed to be correct, except I was getting results from my query and var_dump($currentDay) using that variable that were for the following day as I typically work into the night. I then used "echo date_default_timezone_get();" to further test and compare the results.

I searched as "cjacunad at gmail dot com" had suggested in the php.ini file and low and behold, there was the issue. Running a localhost through PHPmyadmin(XAMPP) I found my date.timezone setting was indeed set to Germany/Berlin. I set it to the suggested setting for America/Los_Angeles first and had an error in phpinfo() file under the date.timezone setting. It had defaulted to UTC. 

So I searched around a bit and found a working solution for my localhost php.ini file:
; Defines the default timezone used by the date functions
date.timezone = "US/Pacific"

After saving and rebooting my localhost Apache server, the phpinfo(); file returned the proper setting for date.timezone. I then tested my code and found it to be working flawlessly.

I hope this helps anyone with similar issues I was facing with my localhost timezone setting.
braulio dot apc at hotmail dot com
1 year ago
For Mexico (México):

Northwest --------- America/Tijuana

Pacific ----------- America/Mazatlan or America/Chihuahua

Central ----------- America/Mexico_City or America/Matamoros or America/Monterrey or America/Merida

South east -------- America/Cancun

cjacunad at gmail dot com
10 years ago
You can set a default time zone for your server from the configuration file (php.ini) at the line:

; Defines the default timezone used by the date functions
date.timezone = America/New_York
Mirai Densetsu
4 years ago
At Brazil, note that the Brazilian official timezone is wrongly described as "America/Sao_Paulo", when it should be "America/Brasilia".

The Sao Paulo timezone does not exist, since this city follow the Brasilia official timezone (BRT or BRST).

[red. This note is incorrect. The argument that "America/Brasilia" is the correct one comes from the *wrong* assumption that the name of the timezone identifier is the capital of a country. That's incorrect. Timezone identifiers are named after the largest city (population wise) in a specific geographic area.]
7 months ago
"KnowEnough..." reported that "America/Los Angeles" didn't work as a time zone in php.ini or as a parameter to date_default_timezone_set(). I, too, found that the time zone listed in the PHP documentation didn't work. I'm somewhere else in America, so I made a guess and used "US/Eastern" rather than "America/New York", as listed in the docs. It worked! If you use it in php.ini, you need to restart Apache.

It seems like the real parameter for the US is "US/timezone-name".
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