diff --git a/src/Event.php b/src/Event.php
index 55cd511..0b95aca 100644
--- a/src/Event.php
+++ b/src/Event.php
@@ -231,7 +231,7 @@ public function toArray(array $customFields = []): array
 
         if(!empty($customFields)) {
             foreach ($customFields as $key => $value) {
-                $result[$key] = $this->{$value};
+                $result[$key] = $this->{$value} ?? null;
             }
         }
 
diff --git a/src/ICal.php b/src/ICal.php
index c6f72cc..1745820 100644
--- a/src/ICal.php
+++ b/src/ICal.php
@@ -7,13 +7,11 @@
 use DateTimeZone;
 use Exception;
 use Psr\Log\LoggerInterface;
-
 use UnexpectedValueException;
 
-use const PHP_VERSION_ID;
-
 class ICal
 {
+    use TimeZoneMaps;
     public const DATE_TIME_FORMAT = 'Ymd\THis';
     public const DATE_TIME_FORMAT_PRETTY = 'F Y H:i:s';
     public const ICAL_DATE_TIME_TEMPLATE = 'TZID=%s:';
@@ -36,260 +34,7 @@ class ICal
         'filterDaysBefore',
         'skipRecurrence',
     ];
-    /**
-     * CLDR time zones mapped to IANA time zones.
-     */
-    private static array $cldrTimeZonesMap = [
-        '(UTC-12:00) International Date Line West' => 'Etc/GMT+12',
-        '(UTC-11:00) Coordinated Universal Time-11' => 'Etc/GMT+11',
-        '(UTC-10:00) Hawaii' => 'Pacific/Honolulu',
-        '(UTC-09:00) Alaska' => 'America/Anchorage',
-        '(UTC-08:00) Pacific Time (US & Canada)' => 'America/Los_Angeles',
-        '(UTC-07:00) Arizona' => 'America/Phoenix',
-        '(UTC-07:00) Chihuahua, La Paz, Mazatlan' => 'America/Chihuahua',
-        '(UTC-07:00) Mountain Time (US & Canada)' => 'America/Denver',
-        '(UTC-06:00) Central America' => 'America/Guatemala',
-        '(UTC-06:00) Central Time (US & Canada)' => 'America/Chicago',
-        '(UTC-06:00) Guadalajara, Mexico City, Monterrey' => 'America/Mexico_City',
-        '(UTC-06:00) Saskatchewan' => 'America/Regina',
-        '(UTC-05:00) Bogota, Lima, Quito, Rio Branco' => 'America/Bogota',
-        '(UTC-05:00) Chetumal' => 'America/Cancun',
-        '(UTC-05:00) Eastern Time (US & Canada)' => 'America/New_York',
-        '(UTC-05:00) Indiana (East)' => 'America/Indianapolis',
-        '(UTC-04:00) Asuncion' => 'America/Asuncion',
-        '(UTC-04:00) Atlantic Time (Canada)' => 'America/Halifax',
-        '(UTC-04:00) Caracas' => 'America/Caracas',
-        '(UTC-04:00) Cuiaba' => 'America/Cuiaba',
-        '(UTC-04:00) Georgetown, La Paz, Manaus, San Juan' => 'America/La_Paz',
-        '(UTC-04:00) Santiago' => 'America/Santiago',
-        '(UTC-03:30) Newfoundland' => 'America/St_Johns',
-        '(UTC-03:00) Brasilia' => 'America/Sao_Paulo',
-        '(UTC-03:00) Cayenne, Fortaleza' => 'America/Cayenne',
-        '(UTC-03:00) City of Buenos Aires' => 'America/Buenos_Aires',
-        '(UTC-03:00) Greenland' => 'America/Godthab',
-        '(UTC-03:00) Montevideo' => 'America/Montevideo',
-        '(UTC-03:00) Salvador' => 'America/Bahia',
-        '(UTC-02:00) Coordinated Universal Time-02' => 'Etc/GMT+2',
-        '(UTC-01:00) Azores' => 'Atlantic/Azores',
-        '(UTC-01:00) Cabo Verde Is.' => 'Atlantic/Cape_Verde',
-        '(UTC) Coordinated Universal Time' => 'Etc/GMT',
-        '(UTC+00:00) Casablanca' => 'Africa/Casablanca',
-        '(UTC+00:00) Dublin, Edinburgh, Lisbon, London' => 'Europe/London',
-        '(UTC+00:00) Monrovia, Reykjavik' => 'Atlantic/Reykjavik',
-        '(UTC+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna' => 'Europe/Berlin',
-        '(UTC+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague' => 'Europe/Budapest',
-        '(UTC+01:00) Brussels, Copenhagen, Madrid, Paris' => 'Europe/Paris',
-        '(UTC+01:00) Sarajevo, Skopje, Warsaw, Zagreb' => 'Europe/Warsaw',
-        '(UTC+01:00) West Central Africa' => 'Africa/Lagos',
-        '(UTC+02:00) Amman' => 'Asia/Amman',
-        '(UTC+02:00) Athens, Bucharest' => 'Europe/Bucharest',
-        '(UTC+02:00) Beirut' => 'Asia/Beirut',
-        '(UTC+02:00) Cairo' => 'Africa/Cairo',
-        '(UTC+02:00) Chisinau' => 'Europe/Chisinau',
-        '(UTC+02:00) Damascus' => 'Asia/Damascus',
-        '(UTC+02:00) Harare, Pretoria' => 'Africa/Johannesburg',
-        '(UTC+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius' => 'Europe/Kiev',
-        '(UTC+02:00) Jerusalem' => 'Asia/Jerusalem',
-        '(UTC+02:00) Kaliningrad' => 'Europe/Kaliningrad',
-        '(UTC+02:00) Tripoli' => 'Africa/Tripoli',
-        '(UTC+02:00) Windhoek' => 'Africa/Windhoek',
-        '(UTC+03:00) Baghdad' => 'Asia/Baghdad',
-        '(UTC+03:00) Istanbul' => 'Europe/Istanbul',
-        '(UTC+03:00) Kuwait, Riyadh' => 'Asia/Riyadh',
-        '(UTC+03:00) Minsk' => 'Europe/Minsk',
-        '(UTC+03:00) Moscow, St. Petersburg, Volgograd' => 'Europe/Moscow',
-        '(UTC+03:00) Nairobi' => 'Africa/Nairobi',
-        '(UTC+03:30) Tehran' => 'Asia/Tehran',
-        '(UTC+04:00) Abu Dhabi, Muscat' => 'Asia/Dubai',
-        '(UTC+04:00) Baku' => 'Asia/Baku',
-        '(UTC+04:00) Izhevsk, Samara' => 'Europe/Samara',
-        '(UTC+04:00) Port Louis' => 'Indian/Mauritius',
-        '(UTC+04:00) Tbilisi' => 'Asia/Tbilisi',
-        '(UTC+04:00) Yerevan' => 'Asia/Yerevan',
-        '(UTC+04:30) Kabul' => 'Asia/Kabul',
-        '(UTC+05:00) Ashgabat, Tashkent' => 'Asia/Tashkent',
-        '(UTC+05:00) Ekaterinburg' => 'Asia/Yekaterinburg',
-        '(UTC+05:00) Islamabad, Karachi' => 'Asia/Karachi',
-        '(UTC+05:30) Chennai, Kolkata, Mumbai, New Delhi' => 'Asia/Calcutta',
-        '(UTC+05:30) Sri Jayawardenepura' => 'Asia/Colombo',
-        '(UTC+05:45) Kathmandu' => 'Asia/Katmandu',
-        '(UTC+06:00) Astana' => 'Asia/Almaty',
-        '(UTC+06:00) Dhaka' => 'Asia/Dhaka',
-        '(UTC+06:30) Yangon (Rangoon)' => 'Asia/Rangoon',
-        '(UTC+07:00) Bangkok, Hanoi, Jakarta' => 'Asia/Bangkok',
-        '(UTC+07:00) Krasnoyarsk' => 'Asia/Krasnoyarsk',
-        '(UTC+07:00) Novosibirsk' => 'Asia/Novosibirsk',
-        '(UTC+08:00) Beijing, Chongqing, Hong Kong, Urumqi' => 'Asia/Shanghai',
-        '(UTC+08:00) Irkutsk' => 'Asia/Irkutsk',
-        '(UTC+08:00) Kuala Lumpur, Singapore' => 'Asia/Singapore',
-        '(UTC+08:00) Perth' => 'Australia/Perth',
-        '(UTC+08:00) Taipei' => 'Asia/Taipei',
-        '(UTC+08:00) Ulaanbaatar' => 'Asia/Ulaanbaatar',
-        '(UTC+09:00) Osaka, Sapporo, Tokyo' => 'Asia/Tokyo',
-        '(UTC+09:00) Pyongyang' => 'Asia/Pyongyang',
-        '(UTC+09:00) Seoul' => 'Asia/Seoul',
-        '(UTC+09:00) Yakutsk' => 'Asia/Yakutsk',
-        '(UTC+09:30) Adelaide' => 'Australia/Adelaide',
-        '(UTC+09:30) Darwin' => 'Australia/Darwin',
-        '(UTC+10:00) Brisbane' => 'Australia/Brisbane',
-        '(UTC+10:00) Canberra, Melbourne, Sydney' => 'Australia/Sydney',
-        '(UTC+10:00) Guam, Port Moresby' => 'Pacific/Port_Moresby',
-        '(UTC+10:00) Hobart' => 'Australia/Hobart',
-        '(UTC+10:00) Vladivostok' => 'Asia/Vladivostok',
-        '(UTC+11:00) Chokurdakh' => 'Asia/Srednekolymsk',
-        '(UTC+11:00) Magadan' => 'Asia/Magadan',
-        '(UTC+11:00) Solomon Is., New Caledonia' => 'Pacific/Guadalcanal',
-        '(UTC+12:00) Anadyr, Petropavlovsk-Kamchatsky' => 'Asia/Kamchatka',
-        '(UTC+12:00) Auckland, Wellington' => 'Pacific/Auckland',
-        '(UTC+12:00) Coordinated Universal Time+12' => 'Etc/GMT-12',
-        '(UTC+12:00) Fiji' => 'Pacific/Fiji',
-        "(UTC+13:00) Nuku'alofa" => 'Pacific/Tongatapu',
-        '(UTC+13:00) Samoa' => 'Pacific/Apia',
-        '(UTC+14:00) Kiritimati Island' => 'Pacific/Kiritimati',
-    ];
-    /**
-     * Maps Windows (non-CLDR) time zone ID to IANA ID. This is pragmatic but not 100% precise as one Windows zone ID
-     * maps to multiple IANA IDs (one for each territory). For all practical purposes this should be good enough, though.
-     *
-     * Source: http://unicode.org/repos/cldr/trunk/common/supplemental/windowsZones.xml
-     */
-    private static array $windowsTimeZonesMap = [
-        'AUS Central Standard Time' => 'Australia/Darwin',
-        'AUS Eastern Standard Time' => 'Australia/Sydney',
-        'Afghanistan Standard Time' => 'Asia/Kabul',
-        'Alaskan Standard Time' => 'America/Anchorage',
-        'Aleutian Standard Time' => 'America/Adak',
-        'Altai Standard Time' => 'Asia/Barnaul',
-        'Arab Standard Time' => 'Asia/Riyadh',
-        'Arabian Standard Time' => 'Asia/Dubai',
-        'Arabic Standard Time' => 'Asia/Baghdad',
-        'Argentina Standard Time' => 'America/Buenos_Aires',
-        'Astrakhan Standard Time' => 'Europe/Astrakhan',
-        'Atlantic Standard Time' => 'America/Halifax',
-        'Aus Central W. Standard Time' => 'Australia/Eucla',
-        'Azerbaijan Standard Time' => 'Asia/Baku',
-        'Azores Standard Time' => 'Atlantic/Azores',
-        'Bahia Standard Time' => 'America/Bahia',
-        'Bangladesh Standard Time' => 'Asia/Dhaka',
-        'Belarus Standard Time' => 'Europe/Minsk',
-        'Bougainville Standard Time' => 'Pacific/Bougainville',
-        '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 (Mexico)' => 'America/Mexico_City',
-        'Central Standard Time' => 'America/Chicago',
-        'Chatham Islands Standard Time' => 'Pacific/Chatham',
-        'China Standard Time' => 'Asia/Shanghai',
-        'Cuba Standard Time' => 'America/Havana',
-        'Dateline Standard Time' => 'Etc/GMT+12',
-        'E. Africa Standard Time' => 'Africa/Nairobi',
-        'E. Australia Standard Time' => 'Australia/Brisbane',
-        'E. Europe Standard Time' => 'Europe/Chisinau',
-        'E. South America Standard Time' => 'America/Sao_Paulo',
-        'Easter Island Standard Time' => 'Pacific/Easter',
-        'Eastern Standard Time (Mexico)' => 'America/Cancun',
-        '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/Bucharest',
-        'Georgian Standard Time' => 'Asia/Tbilisi',
-        'Greenland Standard Time' => 'America/Godthab',
-        'Greenwich Standard Time' => 'Atlantic/Reykjavik',
-        'Haiti Standard Time' => 'America/Port-au-Prince',
-        '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',
-        'Kaliningrad Standard Time' => 'Europe/Kaliningrad',
-        'Korea Standard Time' => 'Asia/Seoul',
-        'Libya Standard Time' => 'Africa/Tripoli',
-        'Line Islands Standard Time' => 'Pacific/Kiritimati',
-        'Lord Howe Standard Time' => 'Australia/Lord_Howe',
-        'Magadan Standard Time' => 'Asia/Magadan',
-        'Magallanes Standard Time' => 'America/Punta_Arenas',
-        'Marquesas Standard Time' => 'Pacific/Marquesas',
-        'Mauritius Standard Time' => 'Indian/Mauritius',
-        'Middle East Standard Time' => 'Asia/Beirut',
-        'Montevideo Standard Time' => 'America/Montevideo',
-        'Morocco Standard Time' => 'Africa/Casablanca',
-        'Mountain Standard Time (Mexico)' => 'America/Chihuahua',
-        'Mountain Standard Time' => 'America/Denver',
-        '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',
-        'Norfolk Standard Time' => 'Pacific/Norfolk',
-        'North Asia East Standard Time' => 'Asia/Irkutsk',
-        'North Asia Standard Time' => 'Asia/Krasnoyarsk',
-        'North Korea Standard Time' => 'Asia/Pyongyang',
-        'Omsk Standard Time' => 'Asia/Omsk',
-        'Pacific SA Standard Time' => 'America/Santiago',
-        'Pacific Standard Time (Mexico)' => 'America/Tijuana',
-        'Pacific Standard Time' => 'America/Los_Angeles',
-        'Pakistan Standard Time' => 'Asia/Karachi',
-        'Paraguay Standard Time' => 'America/Asuncion',
-        'Romance Standard Time' => 'Europe/Paris',
-        'Russia Time Zone 10' => 'Asia/Srednekolymsk',
-        'Russia Time Zone 11' => 'Asia/Kamchatka',
-        'Russia Time Zone 3' => 'Europe/Samara',
-        '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',
-        'Saint Pierre Standard Time' => 'America/Miquelon',
-        'Sakhalin Standard Time' => 'Asia/Sakhalin',
-        'Samoa Standard Time' => 'Pacific/Apia',
-        'Sao Tome Standard Time' => 'Africa/Sao_Tome',
-        'Saratov Standard Time' => 'Europe/Saratov',
-        'Singapore Standard Time' => 'Asia/Singapore',
-        'South Africa Standard Time' => 'Africa/Johannesburg',
-        'Sri Lanka Standard Time' => 'Asia/Colombo',
-        'Sudan Standard Time' => 'Africa/Tripoli',
-        'Syria Standard Time' => 'Asia/Damascus',
-        'Taipei Standard Time' => 'Asia/Taipei',
-        'Tasmania Standard Time' => 'Australia/Hobart',
-        'Tocantins Standard Time' => 'America/Araguaina',
-        'Tokyo Standard Time' => 'Asia/Tokyo',
-        'Tomsk Standard Time' => 'Asia/Tomsk',
-        'Tonga Standard Time' => 'Pacific/Tongatapu',
-        'Transbaikal Standard Time' => 'Asia/Chita',
-        'Turkey Standard Time' => 'Europe/Istanbul',
-        'Turks And Caicos Standard Time' => 'America/Grand_Turk',
-        'US Eastern Standard Time' => 'America/Indianapolis',
-        'US Mountain Standard Time' => 'America/Phoenix',
-        'UTC' => 'Etc/GMT',
-        'UTC+12' => 'Etc/GMT-12',
-        'UTC+13' => 'Etc/GMT-13',
-        'UTC-02' => 'Etc/GMT+2',
-        'UTC-08' => 'Etc/GMT+8',
-        'UTC-09' => 'Etc/GMT+9',
-        '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',
-        'W. Mongolia Standard Time' => 'Asia/Hovd',
-        'West Asia Standard Time' => 'Asia/Tashkent',
-        'West Bank Standard Time' => 'Asia/Hebron',
-        'West Pacific Standard Time' => 'Pacific/Port_Moresby',
-        'Yakutsk Standard Time' => 'Asia/Yakutsk',
-    ];
+
     /**
      * Tracks the number of alarms in the current iCal feed
      *
@@ -417,6 +162,10 @@ class ICal
      * @var LoggerInterface|null $logger
      */
     protected ?LoggerInterface $logger;
+    /**
+     * @param array<Event> $events
+     */
+    protected array $events = [];
     /**
      * If `$filterDaysBefore` or `$filterDaysAfter` are set then the events are filtered according to the window defined
      * by this field and `$windowMaxTimestamp`.
@@ -432,27 +181,16 @@ class ICal
      */
     private bool $shouldFilterByWindow = false;
 
-    /**
-     * @param array<Event> $events
-     */
-    protected array $events = [];
-
     /**
      * Creates the ICal object
      *
      * @param array $lines
      * @param array $options
+     * @param LoggerInterface|null $logger
      * @throws Exception
      */
     public function __construct(array $lines = [], array $options = [], ?LoggerInterface $logger = null)
     {
-        /**
-         * TODO: check and remove if redundant, or try to solve without ini_set()
-         */
-        if (PHP_VERSION_ID < 80100) {
-            ini_set('auto_detect_line_endings', '1');
-        }
-
         $this->logger = $logger;
 
 
@@ -1261,7 +999,7 @@ public function iCalDateToDateTime(string $icalDate): DateTime
         preg_match($pattern, $icalDate, $date);
 
         if (empty($date)) {
-            throw new \UnexpectedValueException('Invalid iCal date format.');
+            throw new UnexpectedValueException('Invalid iCal date format.');
         }
 
         // A Unix timestamp usually cannot represent a date prior to 1 Jan 1970.
@@ -2312,6 +2050,24 @@ public function calendarTimeZone(bool $ignoreUtc = false): ?string
         return $timeZone;
     }
 
+    /**
+     * Returns generator of Events.
+     * Every event is a class with the event
+     * details being properties within it.
+     *
+     * @return void
+     */
+    protected function loadEvents(): void
+    {
+        $events = $this->cal['VEVENT'] ?? [];
+
+        if (!empty($events)) {
+            foreach ($events as $event) {
+                $this->events[] = new Event($event);
+            }
+        }
+    }
+
     /**
      * Initialises lines from a string
      *
@@ -2371,32 +2127,6 @@ public function hasEvents(): bool
         return !empty($this->events);
     }
 
-    /**
-     * Returns generator of Events.
-     * Every event is a class with the event
-     * details being properties within it.
-     *
-     * @return void
-     */
-    protected function loadEvents(): void
-    {
-        $events = $this->cal['VEVENT'] ?? [];
-
-        if (!empty($events)) {
-            foreach ($events as $event) {
-                $this->events[] = new Event($event);
-            }
-        }
-    }
-
-    /**
-     * @return array<Event>
-     */
-    public function getEvents(): array
-    {
-        return $this->events;
-    }
-
     /**
      * Returns a sorted array of the events following a given string,
      * or `false` if no events exist in the range.
@@ -2531,6 +2261,14 @@ public function sortEventsWithOrder(array $events, int $sortOrder = SORT_ASC): a
         return $extendedEvents;
     }
 
+    /**
+     * @return array<Event>
+     */
+    public function getEvents(): array
+    {
+        return $this->events;
+    }
+
     /**
      * @param LoggerInterface $logger
      * @return void
diff --git a/src/TimeZoneMaps.php b/src/TimeZoneMaps.php
new file mode 100644
index 0000000..f53a57b
--- /dev/null
+++ b/src/TimeZoneMaps.php
@@ -0,0 +1,261 @@
+<?php
+
+namespace Rw4lll\ICal;
+
+trait TimeZoneMaps
+{
+    /**
+     * CLDR time zones mapped to IANA time zones.
+     */
+    private static array $cldrTimeZonesMap = [
+        '(UTC-12:00) International Date Line West' => 'Etc/GMT+12',
+        '(UTC-11:00) Coordinated Universal Time-11' => 'Etc/GMT+11',
+        '(UTC-10:00) Hawaii' => 'Pacific/Honolulu',
+        '(UTC-09:00) Alaska' => 'America/Anchorage',
+        '(UTC-08:00) Pacific Time (US & Canada)' => 'America/Los_Angeles',
+        '(UTC-07:00) Arizona' => 'America/Phoenix',
+        '(UTC-07:00) Chihuahua, La Paz, Mazatlan' => 'America/Chihuahua',
+        '(UTC-07:00) Mountain Time (US & Canada)' => 'America/Denver',
+        '(UTC-06:00) Central America' => 'America/Guatemala',
+        '(UTC-06:00) Central Time (US & Canada)' => 'America/Chicago',
+        '(UTC-06:00) Guadalajara, Mexico City, Monterrey' => 'America/Mexico_City',
+        '(UTC-06:00) Saskatchewan' => 'America/Regina',
+        '(UTC-05:00) Bogota, Lima, Quito, Rio Branco' => 'America/Bogota',
+        '(UTC-05:00) Chetumal' => 'America/Cancun',
+        '(UTC-05:00) Eastern Time (US & Canada)' => 'America/New_York',
+        '(UTC-05:00) Indiana (East)' => 'America/Indianapolis',
+        '(UTC-04:00) Asuncion' => 'America/Asuncion',
+        '(UTC-04:00) Atlantic Time (Canada)' => 'America/Halifax',
+        '(UTC-04:00) Caracas' => 'America/Caracas',
+        '(UTC-04:00) Cuiaba' => 'America/Cuiaba',
+        '(UTC-04:00) Georgetown, La Paz, Manaus, San Juan' => 'America/La_Paz',
+        '(UTC-04:00) Santiago' => 'America/Santiago',
+        '(UTC-03:30) Newfoundland' => 'America/St_Johns',
+        '(UTC-03:00) Brasilia' => 'America/Sao_Paulo',
+        '(UTC-03:00) Cayenne, Fortaleza' => 'America/Cayenne',
+        '(UTC-03:00) City of Buenos Aires' => 'America/Buenos_Aires',
+        '(UTC-03:00) Greenland' => 'America/Godthab',
+        '(UTC-03:00) Montevideo' => 'America/Montevideo',
+        '(UTC-03:00) Salvador' => 'America/Bahia',
+        '(UTC-02:00) Coordinated Universal Time-02' => 'Etc/GMT+2',
+        '(UTC-01:00) Azores' => 'Atlantic/Azores',
+        '(UTC-01:00) Cabo Verde Is.' => 'Atlantic/Cape_Verde',
+        '(UTC) Coordinated Universal Time' => 'Etc/GMT',
+        '(UTC+00:00) Casablanca' => 'Africa/Casablanca',
+        '(UTC+00:00) Dublin, Edinburgh, Lisbon, London' => 'Europe/London',
+        '(UTC+00:00) Monrovia, Reykjavik' => 'Atlantic/Reykjavik',
+        '(UTC+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna' => 'Europe/Berlin',
+        '(UTC+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague' => 'Europe/Budapest',
+        '(UTC+01:00) Brussels, Copenhagen, Madrid, Paris' => 'Europe/Paris',
+        '(UTC+01:00) Sarajevo, Skopje, Warsaw, Zagreb' => 'Europe/Warsaw',
+        '(UTC+01:00) West Central Africa' => 'Africa/Lagos',
+        '(UTC+02:00) Amman' => 'Asia/Amman',
+        '(UTC+02:00) Athens, Bucharest' => 'Europe/Bucharest',
+        '(UTC+02:00) Beirut' => 'Asia/Beirut',
+        '(UTC+02:00) Cairo' => 'Africa/Cairo',
+        '(UTC+02:00) Chisinau' => 'Europe/Chisinau',
+        '(UTC+02:00) Damascus' => 'Asia/Damascus',
+        '(UTC+02:00) Harare, Pretoria' => 'Africa/Johannesburg',
+        '(UTC+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius' => 'Europe/Kiev',
+        '(UTC+02:00) Jerusalem' => 'Asia/Jerusalem',
+        '(UTC+02:00) Kaliningrad' => 'Europe/Kaliningrad',
+        '(UTC+02:00) Tripoli' => 'Africa/Tripoli',
+        '(UTC+02:00) Windhoek' => 'Africa/Windhoek',
+        '(UTC+03:00) Baghdad' => 'Asia/Baghdad',
+        '(UTC+03:00) Istanbul' => 'Europe/Istanbul',
+        '(UTC+03:00) Kuwait, Riyadh' => 'Asia/Riyadh',
+        '(UTC+03:00) Minsk' => 'Europe/Minsk',
+        '(UTC+03:00) Moscow, St. Petersburg, Volgograd' => 'Europe/Moscow',
+        '(UTC+03:00) Nairobi' => 'Africa/Nairobi',
+        '(UTC+03:30) Tehran' => 'Asia/Tehran',
+        '(UTC+04:00) Abu Dhabi, Muscat' => 'Asia/Dubai',
+        '(UTC+04:00) Baku' => 'Asia/Baku',
+        '(UTC+04:00) Izhevsk, Samara' => 'Europe/Samara',
+        '(UTC+04:00) Port Louis' => 'Indian/Mauritius',
+        '(UTC+04:00) Tbilisi' => 'Asia/Tbilisi',
+        '(UTC+04:00) Yerevan' => 'Asia/Yerevan',
+        '(UTC+04:30) Kabul' => 'Asia/Kabul',
+        '(UTC+05:00) Ashgabat, Tashkent' => 'Asia/Tashkent',
+        '(UTC+05:00) Ekaterinburg' => 'Asia/Yekaterinburg',
+        '(UTC+05:00) Islamabad, Karachi' => 'Asia/Karachi',
+        '(UTC+05:30) Chennai, Kolkata, Mumbai, New Delhi' => 'Asia/Calcutta',
+        '(UTC+05:30) Sri Jayawardenepura' => 'Asia/Colombo',
+        '(UTC+05:45) Kathmandu' => 'Asia/Katmandu',
+        '(UTC+06:00) Astana' => 'Asia/Almaty',
+        '(UTC+06:00) Dhaka' => 'Asia/Dhaka',
+        '(UTC+06:30) Yangon (Rangoon)' => 'Asia/Rangoon',
+        '(UTC+07:00) Bangkok, Hanoi, Jakarta' => 'Asia/Bangkok',
+        '(UTC+07:00) Krasnoyarsk' => 'Asia/Krasnoyarsk',
+        '(UTC+07:00) Novosibirsk' => 'Asia/Novosibirsk',
+        '(UTC+08:00) Beijing, Chongqing, Hong Kong, Urumqi' => 'Asia/Shanghai',
+        '(UTC+08:00) Irkutsk' => 'Asia/Irkutsk',
+        '(UTC+08:00) Kuala Lumpur, Singapore' => 'Asia/Singapore',
+        '(UTC+08:00) Perth' => 'Australia/Perth',
+        '(UTC+08:00) Taipei' => 'Asia/Taipei',
+        '(UTC+08:00) Ulaanbaatar' => 'Asia/Ulaanbaatar',
+        '(UTC+09:00) Osaka, Sapporo, Tokyo' => 'Asia/Tokyo',
+        '(UTC+09:00) Pyongyang' => 'Asia/Pyongyang',
+        '(UTC+09:00) Seoul' => 'Asia/Seoul',
+        '(UTC+09:00) Yakutsk' => 'Asia/Yakutsk',
+        '(UTC+09:30) Adelaide' => 'Australia/Adelaide',
+        '(UTC+09:30) Darwin' => 'Australia/Darwin',
+        '(UTC+10:00) Brisbane' => 'Australia/Brisbane',
+        '(UTC+10:00) Canberra, Melbourne, Sydney' => 'Australia/Sydney',
+        '(UTC+10:00) Guam, Port Moresby' => 'Pacific/Port_Moresby',
+        '(UTC+10:00) Hobart' => 'Australia/Hobart',
+        '(UTC+10:00) Vladivostok' => 'Asia/Vladivostok',
+        '(UTC+11:00) Chokurdakh' => 'Asia/Srednekolymsk',
+        '(UTC+11:00) Magadan' => 'Asia/Magadan',
+        '(UTC+11:00) Solomon Is., New Caledonia' => 'Pacific/Guadalcanal',
+        '(UTC+12:00) Anadyr, Petropavlovsk-Kamchatsky' => 'Asia/Kamchatka',
+        '(UTC+12:00) Auckland, Wellington' => 'Pacific/Auckland',
+        '(UTC+12:00) Coordinated Universal Time+12' => 'Etc/GMT-12',
+        '(UTC+12:00) Fiji' => 'Pacific/Fiji',
+        "(UTC+13:00) Nuku'alofa" => 'Pacific/Tongatapu',
+        '(UTC+13:00) Samoa' => 'Pacific/Apia',
+        '(UTC+14:00) Kiritimati Island' => 'Pacific/Kiritimati',
+    ];
+    /**
+     * Maps Windows (non-CLDR) time zone ID to IANA ID. This is pragmatic but not 100% precise as one Windows zone ID
+     * maps to multiple IANA IDs (one for each territory). For all practical purposes this should be good enough, though.
+     *
+     * Source: http://unicode.org/repos/cldr/trunk/common/supplemental/windowsZones.xml
+     */
+    private static array $windowsTimeZonesMap = [
+        'AUS Central Standard Time' => 'Australia/Darwin',
+        'AUS Eastern Standard Time' => 'Australia/Sydney',
+        'Afghanistan Standard Time' => 'Asia/Kabul',
+        'Alaskan Standard Time' => 'America/Anchorage',
+        'Aleutian Standard Time' => 'America/Adak',
+        'Altai Standard Time' => 'Asia/Barnaul',
+        'Arab Standard Time' => 'Asia/Riyadh',
+        'Arabian Standard Time' => 'Asia/Dubai',
+        'Arabic Standard Time' => 'Asia/Baghdad',
+        'Argentina Standard Time' => 'America/Buenos_Aires',
+        'Astrakhan Standard Time' => 'Europe/Astrakhan',
+        'Atlantic Standard Time' => 'America/Halifax',
+        'Aus Central W. Standard Time' => 'Australia/Eucla',
+        'Azerbaijan Standard Time' => 'Asia/Baku',
+        'Azores Standard Time' => 'Atlantic/Azores',
+        'Bahia Standard Time' => 'America/Bahia',
+        'Bangladesh Standard Time' => 'Asia/Dhaka',
+        'Belarus Standard Time' => 'Europe/Minsk',
+        'Bougainville Standard Time' => 'Pacific/Bougainville',
+        '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 (Mexico)' => 'America/Mexico_City',
+        'Central Standard Time' => 'America/Chicago',
+        'Chatham Islands Standard Time' => 'Pacific/Chatham',
+        'China Standard Time' => 'Asia/Shanghai',
+        'Cuba Standard Time' => 'America/Havana',
+        'Dateline Standard Time' => 'Etc/GMT+12',
+        'E. Africa Standard Time' => 'Africa/Nairobi',
+        'E. Australia Standard Time' => 'Australia/Brisbane',
+        'E. Europe Standard Time' => 'Europe/Chisinau',
+        'E. South America Standard Time' => 'America/Sao_Paulo',
+        'Easter Island Standard Time' => 'Pacific/Easter',
+        'Eastern Standard Time (Mexico)' => 'America/Cancun',
+        '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/Bucharest',
+        'Georgian Standard Time' => 'Asia/Tbilisi',
+        'Greenland Standard Time' => 'America/Godthab',
+        'Greenwich Standard Time' => 'Atlantic/Reykjavik',
+        'Haiti Standard Time' => 'America/Port-au-Prince',
+        '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',
+        'Kaliningrad Standard Time' => 'Europe/Kaliningrad',
+        'Korea Standard Time' => 'Asia/Seoul',
+        'Libya Standard Time' => 'Africa/Tripoli',
+        'Line Islands Standard Time' => 'Pacific/Kiritimati',
+        'Lord Howe Standard Time' => 'Australia/Lord_Howe',
+        'Magadan Standard Time' => 'Asia/Magadan',
+        'Magallanes Standard Time' => 'America/Punta_Arenas',
+        'Marquesas Standard Time' => 'Pacific/Marquesas',
+        'Mauritius Standard Time' => 'Indian/Mauritius',
+        'Middle East Standard Time' => 'Asia/Beirut',
+        'Montevideo Standard Time' => 'America/Montevideo',
+        'Morocco Standard Time' => 'Africa/Casablanca',
+        'Mountain Standard Time (Mexico)' => 'America/Chihuahua',
+        'Mountain Standard Time' => 'America/Denver',
+        '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',
+        'Norfolk Standard Time' => 'Pacific/Norfolk',
+        'North Asia East Standard Time' => 'Asia/Irkutsk',
+        'North Asia Standard Time' => 'Asia/Krasnoyarsk',
+        'North Korea Standard Time' => 'Asia/Pyongyang',
+        'Omsk Standard Time' => 'Asia/Omsk',
+        'Pacific SA Standard Time' => 'America/Santiago',
+        'Pacific Standard Time (Mexico)' => 'America/Tijuana',
+        'Pacific Standard Time' => 'America/Los_Angeles',
+        'Pakistan Standard Time' => 'Asia/Karachi',
+        'Paraguay Standard Time' => 'America/Asuncion',
+        'Romance Standard Time' => 'Europe/Paris',
+        'Russia Time Zone 10' => 'Asia/Srednekolymsk',
+        'Russia Time Zone 11' => 'Asia/Kamchatka',
+        'Russia Time Zone 3' => 'Europe/Samara',
+        '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',
+        'Saint Pierre Standard Time' => 'America/Miquelon',
+        'Sakhalin Standard Time' => 'Asia/Sakhalin',
+        'Samoa Standard Time' => 'Pacific/Apia',
+        'Sao Tome Standard Time' => 'Africa/Sao_Tome',
+        'Saratov Standard Time' => 'Europe/Saratov',
+        'Singapore Standard Time' => 'Asia/Singapore',
+        'South Africa Standard Time' => 'Africa/Johannesburg',
+        'Sri Lanka Standard Time' => 'Asia/Colombo',
+        'Sudan Standard Time' => 'Africa/Tripoli',
+        'Syria Standard Time' => 'Asia/Damascus',
+        'Taipei Standard Time' => 'Asia/Taipei',
+        'Tasmania Standard Time' => 'Australia/Hobart',
+        'Tocantins Standard Time' => 'America/Araguaina',
+        'Tokyo Standard Time' => 'Asia/Tokyo',
+        'Tomsk Standard Time' => 'Asia/Tomsk',
+        'Tonga Standard Time' => 'Pacific/Tongatapu',
+        'Transbaikal Standard Time' => 'Asia/Chita',
+        'Turkey Standard Time' => 'Europe/Istanbul',
+        'Turks And Caicos Standard Time' => 'America/Grand_Turk',
+        'US Eastern Standard Time' => 'America/Indianapolis',
+        'US Mountain Standard Time' => 'America/Phoenix',
+        'UTC' => 'Etc/GMT',
+        'UTC+12' => 'Etc/GMT-12',
+        'UTC+13' => 'Etc/GMT-13',
+        'UTC-02' => 'Etc/GMT+2',
+        'UTC-08' => 'Etc/GMT+8',
+        'UTC-09' => 'Etc/GMT+9',
+        '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',
+        'W. Mongolia Standard Time' => 'Asia/Hovd',
+        'West Asia Standard Time' => 'Asia/Tashkent',
+        'West Bank Standard Time' => 'Asia/Hebron',
+        'West Pacific Standard Time' => 'Pacific/Port_Moresby',
+        'Yakutsk Standard Time' => 'Asia/Yakutsk',
+    ];
+}