Azure Web App、便利なためいろいろなプロジェクトに使用しています。

ただ、デフォでサーバー時間がGMTのため、 DateTime.Now みたいな関数を使う際にはGMTになってしまいます。

ということで、ここで日本時間へ設定してみます。

設定

App Service > Configuration へ

New application setting をクリック

WEBSITE_TIME_ZONE　を Tokyo Standard Timeに設定します。

確認

アプリケーションを該当サーバーにあげて、local で時間が取得できるように下記のコードを用意。
（CLからたたいたほうが簡単かも)

[HttpGet("/DateTimeNow")]
[ProducesResponseType(201)]
public ActionResult GetServerTime()
{
  return Ok(DateTime.Now);
}

サーバーにて確認

ちゃんと日本時間になっていました。

他の時間

他の時間帯に設定したいときは下記の値を参照ください。

• Value="Morocco Standard Time" For (GMT) Casablanca
• Value="GMT Standard Time" For (GMT) Greenwich Mean Time : Dublin, Edinburgh, Lisbon, London
• Value="Greenwich Standard Time" For (GMT) Monrovia, Reykjavik
• Value="W. Europe Standard Time" For (GMT+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
• Value="Central Europe Standard Time" For (GMT+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague
• Value="Romance Standard Time" For (GMT+01:00) Brussels, Copenhagen, Madrid, Paris
• Value="Central European Standard Time" For (GMT+01:00) Sarajevo, Skopje, Warsaw, Zagreb
• Value="W. Central Africa Standard Time" For (GMT+01:00) West Central Africa
• Value="Jordan Standard Time" For (GMT+02:00) Amman
• Value="GTB Standard Time" For (GMT+02:00) Athens, Bucharest, Istanbul
• Value="Middle East Standard Time" For (GMT+02:00) Beirut
• Value="Egypt Standard Time" For (GMT+02:00) Cairo
• Value="South Africa Standard Time" For (GMT+02:00) Harare, Pretoria
• Value="FLE Standard Time" For (GMT+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius
• Value="Israel Standard Time" For (GMT+02:00) Jerusalem
• Value="E. Europe Standard Time" For (GMT+02:00) Minsk
• Value="Namibia Standard Time" For (GMT+02:00) Windhoek
• Value="Arabic Standard Time" For (GMT+03:00) Baghdad
• Value="Arab Standard Time" For (GMT+03:00) Kuwait, Riyadh
• Value="Russian Standard Time" For (GMT+03:00) Moscow, St. Petersburg, Volgograd
• Value="E. Africa Standard Time" For (GMT+03:00) Nairobi
• Value="Georgian Standard Time" For (GMT+03:00) Tbilisi
• Value="Iran Standard Time" For (GMT+03:30) Tehran
• Value="Arabian Standard Time" For (GMT+04:00) Abu Dhabi, Muscat
• Value="Azerbaijan Standard Time" For (GMT+04:00) Baku
• Value="Mauritius Standard Time" For (GMT+04:00) Port Louis
• Value="Caucasus Standard Time" For (GMT+04:00) Yerevan
• Value="Afghanistan Standard Time" For (GMT+04:30) Kabul
• Value="Ekaterinburg Standard Time" For (GMT+05:00) Ekaterinburg
• Value="Pakistan Standard Time" For (GMT+05:00) Islamabad, Karachi
• Value="West Asia Standard Time" For (GMT+05:00) Tashkent
• Value="India Standard Time" For (GMT+05:30) Chennai, Kolkata, Mumbai, New Delhi
• Value="Sri Lanka Standard Time" For (GMT+05:30) Sri Jayawardenepura
• Value="Nepal Standard Time" For (GMT+05:45) Kathmandu
• Value="N. Central Asia Standard Time" For (GMT+06:00) Almaty, Novosibirsk
• Value="Central Asia Standard Time" For (GMT+06:00) Astana, Dhaka
• Value="Myanmar Standard Time" For (GMT+06:30) Yangon (Rangoon)
• Value="SE Asia Standard Time" For (GMT+07:00) Bangkok, Hanoi, Jakarta
• Value="North Asia Standard Time" For (GMT+07:00) Krasnoyarsk
• Value="China Standard Time" For (GMT+08:00) Beijing, Chongqing, Hong Kong, Urumqi
• Value="North Asia East Standard Time" For (GMT+08:00) Irkutsk, Ulaan Bataar
• Value="Singapore Standard Time" For (GMT+08:00) Kuala Lumpur, Singapore
• Value="W. Australia Standard Time" For (GMT+08:00) Perth
• Value="Taipei Standard Time" For (GMT+08:00) Taipei
• Value="Tokyo Standard Time" For (GMT+09:00) Osaka, Sapporo, Tokyo
• Value="Korea Standard Time" For (GMT+09:00) Seoul
• Value="Yakutsk Standard Time" For (GMT+09:00) Yakutsk
• Value="Cen. Australia Standard Time" For (GMT+09:30) Adelaide
• Value="AUS Central Standard Time" For (GMT+09:30) Darwin
• Value="E. Australia Standard Time" For (GMT+10:00) Brisbane
• Value="AUS Eastern Standard Time" For (GMT+10:00) Canberra, Melbourne, Sydney
• Value="West Pacific Standard Time" For (GMT+10:00) Guam, Port Moresby
• Value="Tasmania Standard Time" For (GMT+10:00) Hobart
• Value="Vladivostok Standard Time" For (GMT+10:00) Vladivostok
• Value="Central Pacific Standard Time" For (GMT+11:00) Magadan, Solomon Is., New Caledonia
• Value="New Zealand Standard Time" For (GMT+12:00) Auckland, Wellington
• Value="Fiji Standard Time" For (GMT+12:00) Fiji, Kamchatka, Marshall Is.
• Value="Tonga Standard Time" For (GMT+13:00) Nuku'alofa
• Value="Azores Standard Time" For (GMT-01:00) Azores
• Value="Cape Verde Standard Time" For (GMT-01:00) Cape Verde Is.
• Value="Mid-Atlantic Standard Time" For (GMT-02:00) Mid-Atlantic
• Value="E. South America Standard Time" For (GMT-03:00) Brasilia
• Value="Argentina Standard Time" For (GMT-03:00) Buenos Aires
• Value="SA Eastern Standard Time" For (GMT-03:00) Georgetown
• Value="Greenland Standard Time" For (GMT-03:00) Greenland
• Value="Montevideo Standard Time" For (GMT-03:00) Montevideo
• Value="Newfoundland Standard Time" For (GMT-03:30) Newfoundland
• Value="Atlantic Standard Time" For (GMT-04:00) Atlantic Time (Canada)
• Value="SA Western Standard Time" For (GMT-04:00) La Paz
• Value="Central Brazilian Standard Time" For (GMT-04:00) Manaus
• Value="Pacific SA Standard Time" For (GMT-04:00) Santiago
• Value="Venezuela Standard Time" For (GMT-04:30) Caracas
• Value="SA Pacific Standard Time" For (GMT-05:00) Bogota, Lima, Quito, Rio Branco
• Value="Eastern Standard Time" For (GMT-05:00) Eastern Time (US & Canada)
• Value="US Eastern Standard Time" For (GMT-05:00) Indiana (East)
• Value="Central America Standard Time" For (GMT-06:00) Central America
• Value="Central Standard Time" For (GMT-06:00) Central Time (US & Canada)
• Value="Central Standard Time (Mexico)" For (GMT-06:00) Guadalajara, Mexico City,Monterrey
• Value="Canada Central Standard Time" For (GMT-06:00) Saskatchewan
• Value="US Mountain Standard Time" For (GMT-07:00) Arizona
• Value="Mountain Standard Time (Mexico)" For (GMT-07:00) Chihuahua, La Paz, Mazatlan
• Value="Mountain Standard Time" For (GMT-07:00) Mountain Time (US & Canada)
• Value="Pacific Standard Time" For (GMT-08:00) Pacific Time (US & Canada)
• Value="Pacific Standard Time (Mexico)" For (GMT-08:00) Tijuana, Baja California
• Value="Alaskan Standard Time" For (GMT-09:00) Alaska
• Value="Hawaiian Standard Time" For (GMT-10:00) Hawaii
• Value="Samoa Standard Time" For (GMT-11:00) Midway Island, Samoa
• Value="Dateline Standard Time" For (GMT-12:00) International Date Line West