اگر در whmcs تاریخ و زمان ، مطابق با محل شما نیست بدین صورت عمل کنید
در هاست خود ، در پوشه ای که whmcs را نصب کردید وارد شود و در فایل configuration.php این خط کد را وارد کنید :
date_default_timezone_set('Asia/Tehran');
در این مثال تهران وارد شده است ، در ادامه مطلب میتوانید مکان های دیگر را مشاهده کنید :
| 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 |
| Antarctica/Casey | Antarctica/Davis | Antarctica/DumontDUrville | Antarctica/Macquarie |
| Antarctica/Mawson | Antarctica/McMurdo | Antarctica/Palmer | Antarctica/Rothera |
| Antarctica/Syowa | Antarctica/Troll | Antarctica/Vostok |
| Asia/Aden | Asia/Almaty | Asia/Amman | Asia/Anadyr |
| Asia/Aqtau | Asia/Aqtobe | Asia/Ashgabat | Asia/Atyrau |
| Asia/Baghdad | Asia/Bahrain | Asia/Baku | Asia/Bangkok |
| Asia/Barnaul | Asia/Beirut | Asia/Bishkek | Asia/Brunei |
| Asia/Chita | Asia/Choibalsan | Asia/Colombo | Asia/Damascus |
| Asia/Dhaka | Asia/Dili | Asia/Dubai | Asia/Dushanbe |
| Asia/Famagusta | Asia/Gaza | Asia/Hebron | Asia/Ho_Chi_Minh |
| Asia/Hong_Kong | Asia/Hovd | Asia/Irkutsk | Asia/Jakarta |
| Asia/Jayapura | Asia/Jerusalem | Asia/Kabul | Asia/Kamchatka |
| Asia/Karachi | Asia/Kathmandu | Asia/Khandyga | Asia/Kolkata |
| Asia/Krasnoyarsk | Asia/Kuala_Lumpur | Asia/Kuching | Asia/Kuwait |
| Asia/Macau | Asia/Magadan | Asia/Makassar | Asia/Manila |
| Asia/Muscat | Asia/Nicosia | Asia/Novokuznetsk | Asia/Novosibirsk |
| Asia/Omsk | Asia/Oral | Asia/Phnom_Penh | Asia/Pontianak |
| Asia/Pyongyang | Asia/Qatar | Asia/Qyzylorda | Asia/Riyadh |
| Asia/Sakhalin | Asia/Samarkand | Asia/Seoul | Asia/Shanghai |
| Asia/Singapore | Asia/Srednekolymsk | Asia/Taipei | Asia/Tashkent |
| Asia/Tbilisi | Asia/Tehran | Asia/Thimphu | Asia/Tokyo |
| Asia/Tomsk | Asia/Ulaanbaatar | Asia/Urumqi | Asia/Ust-Nera |
| Asia/Vientiane | Asia/Vladivostok | Asia/Yakutsk | Asia/Yangon |
| Asia/Yekaterinburg | Asia/Yerevan |
| Atlantic/Azores | Atlantic/Bermuda | Atlantic/Canary | Atlantic/Cape_Verde |
| Atlantic/Faroe | Atlantic/Madeira | Atlantic/Reykjavik | Atlantic/South_Georgia |
| Atlantic/St_Helena | Atlantic/Stanley |
| Australia/Adelaide | Australia/Brisbane | Australia/Broken_Hill | Australia/Currie |
| Australia/Darwin | Australia/Eucla | Australia/Hobart | Australia/Lindeman |
| Australia/Lord_Howe | Australia/Melbourne | Australia/Perth | Australia/Sydney |
| Europe/Amsterdam | Europe/Andorra | Europe/Astrakhan | Europe/Athens |
| Europe/Belgrade | Europe/Berlin | Europe/Bratislava | Europe/Brussels |
| Europe/Bucharest | Europe/Budapest | Europe/Busingen | Europe/Chisinau |
| Europe/Copenhagen | Europe/Dublin | Europe/Gibraltar | Europe/Guernsey |
| Europe/Helsinki | Europe/Isle_of_Man | Europe/Istanbul | Europe/Jersey |
| Europe/Kaliningrad | Europe/Kiev | Europe/Kirov | Europe/Lisbon |
| Europe/Ljubljana | Europe/London | Europe/Luxembourg | Europe/Madrid |
| Europe/Malta | Europe/Mariehamn | Europe/Minsk | Europe/Monaco |
| Europe/Moscow | Europe/Oslo | Europe/Paris | Europe/Podgorica |
| Europe/Prague | Europe/Riga | Europe/Rome | Europe/Samara |
| Europe/San_Marino | Europe/Sarajevo | Europe/Saratov | Europe/Simferopol |
| Europe/Skopje | Europe/Sofia | Europe/Stockholm | Europe/Tallinn |
| Europe/Tirane | Europe/Ulyanovsk | Europe/Uzhgorod | Europe/Vaduz |
| Europe/Vatican | Europe/Vienna | Europe/Vilnius | Europe/Volgograd |
| Europe/Warsaw | Europe/Zagreb | Europe/Zaporozhye | Europe/Zurich |
| Indian/Antananarivo | Indian/Chagos | Indian/Christmas | Indian/Cocos |
| Indian/Comoro | Indian/Kerguelen | Indian/Mahe | Indian/Maldives |
| Indian/Mauritius | Indian/Mayotte | Indian/Reunion |
| Pacific/Apia | Pacific/Auckland | Pacific/Bougainville | Pacific/Chatham |
| Pacific/Chuuk | Pacific/Easter | Pacific/Efate | Pacific/Enderbury |
| Pacific/Fakaofo | Pacific/Fiji | Pacific/Funafuti | Pacific/Galapagos |
| Pacific/Gambier | Pacific/Guadalcanal | Pacific/Guam | Pacific/Honolulu |
| Pacific/Kiritimati | Pacific/Kosrae | Pacific/Kwajalein | Pacific/Majuro |
| Pacific/Marquesas | Pacific/Midway | Pacific/Nauru | Pacific/Niue |
| Pacific/Norfolk | Pacific/Noumea | Pacific/Pago_Pago | Pacific/Palau |
| Pacific/Pitcairn | Pacific/Pohnpei | Pacific/Port_Moresby | Pacific/Rarotonga |
| Pacific/Saipan | Pacific/Tahiti | Pacific/Tarawa | Pacific/Tongatapu |
| Pacific/Wake | Pacific/Wallis |
| Africa/Asmera | Africa/Timbuktu | America/Argentina/ComodRivadavia | America/Atka |
| America/Buenos_Aires | America/Catamarca | America/Coral_Harbour | America/Cordoba |
| America/Ensenada | America/Fort_Wayne | America/Indianapolis | America/Jujuy |
| America/Knox_IN | America/Louisville | America/Mendoza | America/Montreal |
| America/Porto_Acre | America/Rosario | America/Santa_Isabel | America/Shiprock |
| America/Virgin | Antarctica/South_Pole | Asia/Ashkhabad | Asia/Calcutta |
| Asia/Chongqing | Asia/Chungking | Asia/Dacca | Asia/Harbin |
| Asia/Istanbul | Asia/Kashgar | Asia/Katmandu | Asia/Macao |
| Asia/Rangoon | Asia/Saigon | Asia/Tel_Aviv | Asia/Thimbu |
| Asia/Ujung_Pandang | Asia/Ulan_Bator | Atlantic/Faeroe | Atlantic/Jan_Mayen |
| Australia/ACT | Australia/Canberra | Australia/LHI | Australia/North |
| Australia/NSW | Australia/Queensland | Australia/South | Australia/Tasmania |
| Australia/Victoria | Australia/West | Australia/Yancowinna | Brazil/Acre |
| Brazil/DeNoronha | Brazil/East | Brazil/West | Canada/Atlantic |
| Canada/Central | Canada/East-Saskatchewan | Canada/Eastern | Canada/Mountain |
| Canada/Newfoundland | Canada/Pacific | Canada/Saskatchewan | Canada/Yukon |
| CET | Chile/Continental | Chile/EasterIsland | CST6CDT |
| Cuba | EET | Egypt | Eire |
| EST | EST5EDT | Etc/GMT | Etc/GMT+0 |
| Etc/GMT+1 | Etc/GMT+10 | Etc/GMT+11 | Etc/GMT+12 |
| Etc/GMT+2 | Etc/GMT+3 | Etc/GMT+4 | Etc/GMT+5 |
| Etc/GMT+6 | Etc/GMT+7 | Etc/GMT+8 | Etc/GMT+9 |
| Etc/GMT-0 | Etc/GMT-1 | Etc/GMT-10 | Etc/GMT-11 |
| Etc/GMT-12 | Etc/GMT-13 | Etc/GMT-14 | Etc/GMT-2 |
| Etc/GMT-3 | Etc/GMT-4 | Etc/GMT-5 | Etc/GMT-6 |
| Etc/GMT-7 | Etc/GMT-8 | Etc/GMT-9 | Etc/GMT0 |
| Etc/Greenwich | Etc/UCT | Etc/Universal | Etc/UTC |
| Etc/Zulu | Europe/Belfast | Europe/Nicosia | Europe/Tiraspol |
| Factory | GB | GB-Eire | GMT |
| GMT+0 | GMT-0 | GMT0 | Greenwich |
| Hongkong | HST | Iceland | Iran |
| Israel | Jamaica | Japan | Kwajalein |
| Libya | MET | Mexico/BajaNorte | Mexico/BajaSur |
| Mexico/General | MST | MST7MDT | Navajo |
| NZ | NZ-CHAT | Pacific/Johnston | Pacific/Ponape |
| Pacific/Samoa | Pacific/Truk | Pacific/Yap | Poland |
| Portugal | PRC | PST8PDT | ROC |
| ROK | Singapore | Turkey | UCT |
| Universal | US/Alaska | US/Aleutian | US/Arizona |
| US/Central | US/East-Indiana | US/Eastern | US/Hawaii |
| US/Indiana-Starke | US/Michigan | US/Mountain | US/Pacific |
| US/Pacific-New | US/Samoa | UTC | W-SU |
| WET | Zulu |