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TimeZoneUtil.php
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<?php
namespace Sabre\VObject;
/**
* Time zone name translation
*
* This file translates well-known time zone names into "Olson database" time zone names.
*
* @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
* @author Frank Edelhaeuser (fedel@users.sourceforge.net)
* @author Evert Pot (http://evertpot.com/)
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
class TimeZoneUtil {
public static $map = array(
// from http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/zone_tzid.html
// snapshot taken on 2012/01/16
// windows
'AUS Central Standard Time'=>'Australia/Darwin',
'AUS Eastern Standard Time'=>'Australia/Sydney',
'Afghanistan Standard Time'=>'Asia/Kabul',
'Alaskan Standard Time'=>'America/Anchorage',
'Arab Standard Time'=>'Asia/Riyadh',
'Arabian Standard Time'=>'Asia/Dubai',
'Arabic Standard Time'=>'Asia/Baghdad',
'Argentina Standard Time'=>'America/Buenos_Aires',
'Armenian Standard Time'=>'Asia/Yerevan',
'Atlantic Standard Time'=>'America/Halifax',
'Azerbaijan Standard Time'=>'Asia/Baku',
'Azores Standard Time'=>'Atlantic/Azores',
'Bangladesh Standard Time'=>'Asia/Dhaka',
'Canada Central Standard Time'=>'America/Regina',
'Cape Verde Standard Time'=>'Atlantic/Cape_Verde',
'Caucasus Standard Time'=>'Asia/Yerevan',
'Cen. Australia Standard Time'=>'Australia/Adelaide',
'Central America Standard Time'=>'America/Guatemala',
'Central Asia Standard Time'=>'Asia/Almaty',
'Central Brazilian Standard Time'=>'America/Cuiaba',
'Central Europe Standard Time'=>'Europe/Budapest',
'Central European Standard Time'=>'Europe/Warsaw',
'Central Pacific Standard Time'=>'Pacific/Guadalcanal',
'Central Standard Time'=>'America/Chicago',
'Central Standard Time (Mexico)'=>'America/Mexico_City',
'China Standard Time'=>'Asia/Shanghai',
'Dateline Standard Time'=>'Etc/GMT+12',
'E. Africa Standard Time'=>'Africa/Nairobi',
'E. Australia Standard Time'=>'Australia/Brisbane',
'E. Europe Standard Time'=>'Europe/Minsk',
'E. South America Standard Time'=>'America/Sao_Paulo',
'Eastern Standard Time'=>'America/New_York',
'Egypt Standard Time'=>'Africa/Cairo',
'Ekaterinburg Standard Time'=>'Asia/Yekaterinburg',
'FLE Standard Time'=>'Europe/Kiev',
'Fiji Standard Time'=>'Pacific/Fiji',
'GMT Standard Time'=>'Europe/London',
'GTB Standard Time'=>'Europe/Istanbul',
'Georgian Standard Time'=>'Asia/Tbilisi',
'Greenland Standard Time'=>'America/Godthab',
'Greenwich Standard Time'=>'Atlantic/Reykjavik',
'Hawaiian Standard Time'=>'Pacific/Honolulu',
'India Standard Time'=>'Asia/Calcutta',
'Iran Standard Time'=>'Asia/Tehran',
'Israel Standard Time'=>'Asia/Jerusalem',
'Jordan Standard Time'=>'Asia/Amman',
'Kamchatka Standard Time'=>'Asia/Kamchatka',
'Korea Standard Time'=>'Asia/Seoul',
'Magadan Standard Time'=>'Asia/Magadan',
'Mauritius Standard Time'=>'Indian/Mauritius',
'Mexico Standard Time'=>'America/Mexico_City',
'Mexico Standard Time 2'=>'America/Chihuahua',
'Mid-Atlantic Standard Time'=>'Etc/GMT-2',
'Middle East Standard Time'=>'Asia/Beirut',
'Montevideo Standard Time'=>'America/Montevideo',
'Morocco Standard Time'=>'Africa/Casablanca',
'Mountain Standard Time'=>'America/Denver',
'Mountain Standard Time (Mexico)'=>'America/Chihuahua',
'Myanmar Standard Time'=>'Asia/Rangoon',
'N. Central Asia Standard Time'=>'Asia/Novosibirsk',
'Namibia Standard Time'=>'Africa/Windhoek',
'Nepal Standard Time'=>'Asia/Katmandu',
'New Zealand Standard Time'=>'Pacific/Auckland',
'Newfoundland Standard Time'=>'America/St_Johns',
'North Asia East Standard Time'=>'Asia/Irkutsk',
'North Asia Standard Time'=>'Asia/Krasnoyarsk',
'Pacific SA Standard Time'=>'America/Santiago',
'Pacific Standard Time'=>'America/Los_Angeles',
'Pacific Standard Time (Mexico)'=>'America/Santa_Isabel',
'Pakistan Standard Time'=>'Asia/Karachi',
'Paraguay Standard Time'=>'America/Asuncion',
'Romance Standard Time'=>'Europe/Paris',
'Russian Standard Time'=>'Europe/Moscow',
'SA Eastern Standard Time'=>'America/Cayenne',
'SA Pacific Standard Time'=>'America/Bogota',
'SA Western Standard Time'=>'America/La_Paz',
'SE Asia Standard Time'=>'Asia/Bangkok',
'Samoa Standard Time'=>'Pacific/Apia',
'Singapore Standard Time'=>'Asia/Singapore',
'South Africa Standard Time'=>'Africa/Johannesburg',
'Sri Lanka Standard Time'=>'Asia/Colombo',
'Syria Standard Time'=>'Asia/Damascus',
'Taipei Standard Time'=>'Asia/Taipei',
'Tasmania Standard Time'=>'Australia/Hobart',
'Tokyo Standard Time'=>'Asia/Tokyo',
'Tonga Standard Time'=>'Pacific/Tongatapu',
'US Eastern Standard Time'=>'America/Indianapolis',
'US Mountain Standard Time'=>'America/Phoenix',
'UTC+12'=>'Etc/GMT-12',
'UTC-02'=>'Etc/GMT+2',
'UTC-11'=>'Etc/GMT+11',
'Ulaanbaatar Standard Time'=>'Asia/Ulaanbaatar',
'Venezuela Standard Time'=>'America/Caracas',
'Vladivostok Standard Time'=>'Asia/Vladivostok',
'W. Australia Standard Time'=>'Australia/Perth',
'W. Central Africa Standard Time'=>'Africa/Lagos',
'W. Europe Standard Time'=>'Europe/Berlin',
'West Asia Standard Time'=>'Asia/Tashkent',
'West Pacific Standard Time'=>'Pacific/Port_Moresby',
'Yakutsk Standard Time'=>'Asia/Yakutsk',
// Microsoft exchange timezones
// Source:
// http://msdn.microsoft.com/en-us/library/ms988620%28v=exchg.65%29.aspx
//
// Correct timezones deduced with help from:
// http://en.wikipedia.org/wiki/List_of_tz_database_time_zones
'Universal Coordinated Time' => 'UTC',
'Casablanca, Monrovia' => 'Africa/Casablanca',
'Greenwich Mean Time: Dublin, Edinburgh, Lisbon, London' => 'Europe/Lisbon',
'Greenwich Mean Time; Dublin, Edinburgh, London' => 'Europe/London',
'Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna' => 'Europe/Berlin',
'Belgrade, Pozsony, Budapest, Ljubljana, Prague' => 'Europe/Prague',
'Brussels, Copenhagen, Madrid, Paris' => 'Europe/Paris',
'Paris, Madrid, Brussels, Copenhagen' => 'Europe/Paris',
'Prague, Central Europe' => 'Europe/Prague',
'Sarajevo, Skopje, Sofija, Vilnius, Warsaw, Zagreb' => 'Europe/Sarajevo',
'West Central Africa' => 'Africa/Luanda', // This was a best guess
'Athens, Istanbul, Minsk' => 'Europe/Athens',
'Bucharest' => 'Europe/Bucharest',
'Cairo' => 'Africa/Cairo',
'Harare, Pretoria' => 'Africa/Harare',
'Helsinki, Riga, Tallinn' => 'Europe/Helsinki',
'Israel, Jerusalem Standard Time' => 'Asia/Jerusalem',
'Baghdad' => 'Asia/Baghdad',
'Arab, Kuwait, Riyadh' => 'Asia/Kuwait',
'Moscow, St. Petersburg, Volgograd' => 'Europe/Moscow',
'East Africa, Nairobi' => 'Africa/Nairobi',
'Tehran' => 'Asia/Tehran',
'Abu Dhabi, Muscat' => 'Asia/Muscat', // Best guess
'Baku, Tbilisi, Yerevan' => 'Asia/Baku',
'Kabul' => 'Asia/Kabul',
'Ekaterinburg' => 'Asia/Yekaterinburg',
'Islamabad, Karachi, Tashkent' => 'Asia/Karachi',
'Kolkata, Chennai, Mumbai, New Delhi, India Standard Time' => 'Asia/Calcutta',
'Kathmandu, Nepal' => 'Asia/Kathmandu',
'Almaty, Novosibirsk, North Central Asia' => 'Asia/Almaty',
'Astana, Dhaka' => 'Asia/Dhaka',
'Sri Jayawardenepura, Sri Lanka' => 'Asia/Colombo',
'Rangoon' => 'Asia/Rangoon',
'Bangkok, Hanoi, Jakarta' => 'Asia/Bangkok',
'Krasnoyarsk' => 'Asia/Krasnoyarsk',
'Beijing, Chongqing, Hong Kong SAR, Urumqi' => 'Asia/Shanghai',
'Irkutsk, Ulaan Bataar' => 'Asia/Irkutsk',
'Kuala Lumpur, Singapore' => 'Asia/Singapore',
'Perth, Western Australia' => 'Australia/Perth',
'Taipei' => 'Asia/Taipei',
'Osaka, Sapporo, Tokyo' => 'Asia/Tokyo',
'Seoul, Korea Standard time' => 'Asia/Seoul',
'Yakutsk' => 'Asia/Yakutsk',
'Adelaide, Central Australia' => 'Australia/Adelaide',
'Darwin' => 'Australia/Darwin',
'Brisbane, East Australia' => 'Australia/Brisbane',
'Canberra, Melbourne, Sydney, Hobart (year 2000 only)' => 'Australia/Sydney',
'Guam, Port Moresby' => 'Pacific/Guam',
'Hobart, Tasmania' => 'Australia/Hobart',
'Vladivostok' => 'Asia/Vladivostok',
'Magadan, Solomon Is., New Caledonia' => 'Asia/Magadan',
'Auckland, Wellington' => 'Pacific/Auckland',
'Fiji Islands, Kamchatka, Marshall Is.' => 'Pacific/Fiji',
'Nuku\'alofa, Tonga' => 'Pacific/Tongatapu',
'Azores' => 'Atlantic/Azores',
'Cape Verde Is.' => 'Atlantic/Cape_Verde',
'Mid-Atlantic' => 'America/Noronha',
'Brasilia' => 'America/Sao_Paulo', // Best guess
'Buenos Aires' => 'America/Argentina/Buenos_Aires',
'Greenland' => 'America/Godthab',
'Newfoundland' => 'America/St_Johns',
'Atlantic Time (Canada)' => 'America/Halifax',
'Caracas, La Paz' => 'America/Caracas',
'Santiago' => 'America/Santiago',
'Bogota, Lima, Quito' => 'America/Bogota',
'Eastern Time (US & Canada)' => 'America/New_York',
'Indiana (East)' => 'America/Indiana/Indianapolis',
'Central America' => 'America/Guatemala',
'Central Time (US & Canada)' => 'America/Chicago',
'Mexico City, Tegucigalpa' => 'America/Mexico_City',
'Saskatchewan' => 'America/Edmonton',
'Arizona' => 'America/Phoenix',
'Mountain Time (US & Canada)' => 'America/Denver', // Best guess
'Pacific Time (US & Canada); Tijuana' => 'America/Los_Angeles', // Best guess
'Alaska' => 'America/Anchorage',
'Hawaii' => 'Pacific/Honolulu',
'Midway Island, Samoa' => 'Pacific/Midway',
'Eniwetok, Kwajalein, Dateline Time' => 'Pacific/Kwajalein',
// The following list are timezone names that could be generated by
// Lotus / Domino
'Dateline' => 'Etc/GMT-12',
'Samoa' => 'Pacific/Apia',
'Hawaiian' => 'Pacific/Honolulu',
'Alaskan' => 'America/Anchorage',
'Pacific' => 'America/Los_Angeles',
'Pacific Standard Time' => 'America/Los_Angeles',
'Mexico Standard Time 2' => 'America/Chihuahua',
'Mountain' => 'America/Denver',
'Mountain Standard Time' => 'America/Chihuahua',
'US Mountain' => 'America/Phoenix',
'Canada Central' => 'America/Edmonton',
'Central America' => 'America/Guatemala',
'Central' => 'America/Chicago',
'Central Standard Time' => 'America/Mexico_City',
'Mexico' => 'America/Mexico_City',
'Eastern' => 'America/New_York',
'SA Pacific' => 'America/Bogota',
'US Eastern' => 'America/Indiana/Indianapolis',
'Venezuela' => 'America/Caracas',
'Atlantic' => 'America/Halifax',
'Central Brazilian' => 'America/Manaus',
'Pacific SA' => 'America/Santiago',
'SA Western' => 'America/La_Paz',
'Newfoundland' => 'America/St_Johns',
'Argentina' => 'America/Argentina/Buenos_Aires',
'E. South America' => 'America/Belem',
'Greenland' => 'America/Godthab',
'Montevideo' => 'America/Montevideo',
'SA Eastern' => 'America/Belem',
'Mid-Atlantic' => 'Etc/GMT-2',
'Azores' => 'Atlantic/Azores',
'Cape Verde' => 'Atlantic/Cape_Verde',
'Greenwich' => 'Atlantic/Reykjavik', // No I'm serious.. Greenwich is not GMT.
'Morocco' => 'Africa/Casablanca',
'Central Europe' => 'Europe/Prague',
'Central European' => 'Europe/Sarajevo',
'Romance' => 'Europe/Paris',
'W. Central Africa' => 'Africa/Lagos', // Best guess
'W. Europe' => 'Europe/Amsterdam',
'E. Europe' => 'Europe/Minsk',
'Egypt' => 'Africa/Cairo',
'FLE' => 'Europe/Helsinki',
'GTB' => 'Europe/Athens',
'Israel' => 'Asia/Jerusalem',
'Jordan' => 'Asia/Amman',
'Middle East' => 'Asia/Beirut',
'Namibia' => 'Africa/Windhoek',
'South Africa' => 'Africa/Harare',
'Arab' => 'Asia/Kuwait',
'Arabic' => 'Asia/Baghdad',
'E. Africa' => 'Africa/Nairobi',
'Georgian' => 'Asia/Tbilisi',
'Russian' => 'Europe/Moscow',
'Iran' => 'Asia/Tehran',
'Arabian' => 'Asia/Muscat',
'Armenian' => 'Asia/Yerevan',
'Azerbijan' => 'Asia/Baku',
'Caucasus' => 'Asia/Yerevan',
'Mauritius' => 'Indian/Mauritius',
'Afghanistan' => 'Asia/Kabul',
'Ekaterinburg' => 'Asia/Yekaterinburg',
'Pakistan' => 'Asia/Karachi',
'West Asia' => 'Asia/Tashkent',
'India' => 'Asia/Calcutta',
'Sri Lanka' => 'Asia/Colombo',
'Nepal' => 'Asia/Kathmandu',
'Central Asia' => 'Asia/Dhaka',
'N. Central Asia' => 'Asia/Almaty',
'Myanmar' => 'Asia/Rangoon',
'North Asia' => 'Asia/Krasnoyarsk',
'SE Asia' => 'Asia/Bangkok',
'China' => 'Asia/Shanghai',
'North Asia East' => 'Asia/Irkutsk',
'Singapore' => 'Asia/Singapore',
'Taipei' => 'Asia/Taipei',
'W. Australia' => 'Australia/Perth',
'Korea' => 'Asia/Seoul',
'Tokyo' => 'Asia/Tokyo',
'Yakutsk' => 'Asia/Yakutsk',
'AUS Central' => 'Australia/Darwin',
'Cen. Australia' => 'Australia/Adelaide',
'AUS Eastern' => 'Australia/Sydney',
'E. Australia' => 'Australia/Brisbane',
'Tasmania' => 'Australia/Hobart',
'Vladivostok' => 'Asia/Vladivostok',
'West Pacific' => 'Pacific/Guam',
'Central Pacific' => 'Asia/Magadan',
'Fiji' => 'Pacific/Fiji',
'New Zealand' => 'Pacific/Auckland',
'Tonga' => 'Pacific/Tongatapu',
);
/**
* List of microsoft exchange timezone ids.
*
* Source: http://msdn.microsoft.com/en-us/library/aa563018(loband).aspx
*/
public static $microsoftExchangeMap = array(
0 => 'UTC',
31 => 'Africa/Casablanca',
// Insanely, id #2 is used for both Europe/Lisbon, and Europe/Sarajevo.
// I'm not even kidding.. We handle this special case in the
// getTimeZone method.
2 => 'Europe/Lisbon',
1 => 'Europe/London',
4 => 'Europe/Berlin',
6 => 'Europe/Prague',
3 => 'Europe/Paris',
69 => 'Africa/Luanda', // This was a best guess
7 => 'Europe/Athens',
5 => 'Europe/Bucharest',
49 => 'Africa/Cairo',
50 => 'Africa/Harare',
59 => 'Europe/Helsinki',
27 => 'Asia/Jerusalem',
26 => 'Asia/Baghdad',
74 => 'Asia/Kuwait',
51 => 'Europe/Moscow',
56 => 'Africa/Nairobi',
25 => 'Asia/Tehran',
24 => 'Asia/Muscat', // Best guess
54 => 'Asia/Baku',
48 => 'Asia/Kabul',
58 => 'Asia/Yekaterinburg',
47 => 'Asia/Karachi',
23 => 'Asia/Calcutta',
62 => 'Asia/Kathmandu',
46 => 'Asia/Almaty',
71 => 'Asia/Dhaka',
66 => 'Asia/Colombo',
61 => 'Asia/Rangoon',
22 => 'Asia/Bangkok',
64 => 'Asia/Krasnoyarsk',
45 => 'Asia/Shanghai',
63 => 'Asia/Irkutsk',
21 => 'Asia/Singapore',
73 => 'Australia/Perth',
75 => 'Asia/Taipei',
20 => 'Asia/Tokyo',
72 => 'Asia/Seoul',
70 => 'Asia/Yakutsk',
19 => 'Australia/Adelaide',
44 => 'Australia/Darwin',
18 => 'Australia/Brisbane',
76 => 'Australia/Sydney',
43 => 'Pacific/Guam',
42 => 'Australia/Hobart',
68 => 'Asia/Vladivostok',
41 => 'Asia/Magadan',
17 => 'Pacific/Auckland',
40 => 'Pacific/Fiji',
67 => 'Pacific/Tongatapu',
29 => 'Atlantic/Azores',
53 => 'Atlantic/Cape_Verde',
30 => 'America/Noronha',
8 => 'America/Sao_Paulo', // Best guess
32 => 'America/Argentina/Buenos_Aires',
60 => 'America/Godthab',
28 => 'America/St_Johns',
9 => 'America/Halifax',
33 => 'America/Caracas',
65 => 'America/Santiago',
35 => 'America/Bogota',
10 => 'America/New_York',
34 => 'America/Indiana/Indianapolis',
55 => 'America/Guatemala',
11 => 'America/Chicago',
37 => 'America/Mexico_City',
36 => 'America/Edmonton',
38 => 'America/Phoenix',
12 => 'America/Denver', // Best guess
13 => 'America/Los_Angeles', // Best guess
14 => 'America/Anchorage',
15 => 'Pacific/Honolulu',
16 => 'Pacific/Midway',
39 => 'Pacific/Kwajalein',
);
/**
* This method will try to find out the correct timezone for an iCalendar
* date-time value.
*
* You must pass the contents of the TZID parameter, as well as the full
* calendar.
*
* If the lookup fails, this method will return the default PHP timezone
* (as configured using date_default_timezone_set, or the date.timezone ini
* setting).
*
* Alternatively, if $failIfUncertain is set to true, it will throw an
* exception if we cannot accurately determine the timezone.
*
* @param string $tzid
* @param Sabre\VObject\Component $vcalendar
* @return DateTimeZone
*/
static public function getTimeZone($tzid, Component $vcalendar = null, $failIfUncertain = false) {
// First we will just see if the tzid is a support timezone identifier.
try {
return new \DateTimeZone($tzid);
} catch (\Exception $e) {
}
// Next, we check if the tzid is somewhere in our tzid map.
if (isset(self::$map[$tzid])) {
return new \DateTimeZone(self::$map[$tzid]);
}
// Maybe the author was hyper-lazy and just included an offset. We
// support it, but we aren't happy about it.
if (preg_match('/^GMT(\+|-)([0-9]{4})$/', $tzid, $matches)) {
return new \DateTimeZone('Etc/GMT' . $matches[1] . ltrim(substr($matches[2],0,2),'0'));
}
if ($vcalendar) {
// If that didn't work, we will scan VTIMEZONE objects
foreach($vcalendar->select('VTIMEZONE') as $vtimezone) {
if ((string)$vtimezone->TZID === $tzid) {
// Some clients add 'X-LIC-LOCATION' with the olson name.
if (isset($vtimezone->{'X-LIC-LOCATION'})) {
$lic = (string)$vtimezone->{'X-LIC-LOCATION'};
// Libical generators may specify strings like
// "SystemV/EST5EDT". For those we must remove the
// SystemV part.
if (substr($lic,0,8)==='SystemV/') {
$lic = substr($lic,8);
}
try {
return new \DateTimeZone($lic);
} catch (\Exception $e) {
}
}
// Microsoft may add a magic number, which we also have an
// answer for.
if (isset($vtimezone->{'X-MICROSOFT-CDO-TZID'})) {
$cdoId = (int)$vtimezone->{'X-MICROSOFT-CDO-TZID'}->value;
// 2 can mean both Europe/Lisbon and Europe/Sarajevo.
if ($cdoId===2 && strpos((string)$vtimezone->TZID, 'Sarajevo')!==false) {
return new \DateTimeZone('Europe/Sarajevo');
}
if (isset(self::$microsoftExchangeMap[$cdoId])) {
return new \DateTimeZone(self::$microsoftExchangeMap[$cdoId]);
}
}
}
}
}
if ($failIfUncertain) {
throw new \InvalidArgumentException('We were unable to determine the correct PHP timezone for tzid: ' . $tzid);
}
// If we got all the way here, we default to UTC.
return new \DateTimeZone(date_default_timezone_get());
}
}

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