# カレンダー計算 ### 日付への時間の加算または減算 ``` 10 June + 3 weeks | 1 July April 1, 2019 − 3 months 5 days | 27 December 2018 12/02/1988 + 32 years | 12 February 2020 01.05.2005 + 3 years 2 months 3 weeks | 22 July 2008 3 weeks after March 14, 2019 | 4 April 2019 28 days before March 12 | 12 February 2 months 3 days after June 5 | 8 August yesterday - 8 weeks 3 days | 12 July Yesterday + 1 week | 11 June ``` ### 現在を基準とした日付の取得 ``` today + 3 weeks | 1 October now − 1 month | 5 May 4 days from now | 14 September 3 days ago | 7 September ``` ### **2つの日付間の期間を求める** ``` January 10 - February 5 | 3 weeks 5 days 3 March to 30 May | 2 months 3 weeks 6 days days since July 15 | 57 days days till December 25 | 106 days days between 3 March and 30 May | 88 days 1978 to 2021 | 42 years ``` {% hint style="info" %} 時間間隔は、開始日の正午から間隔内の終了日の正午までを計算します。 開始日と終了日の両方を間隔に含めたい場合は、包括的な間隔関数を使用してください（[以下](#inclusive-intervals-of-time-1)を参照）。 {% endhint %} ### 2つの日付間の包括的な時間間隔 ``` April 1 through April 30 in days | 30 days ``` ### 週番号（ISO 8601） ``` week of year | 36 week number on march 12, 2021 | 10 ``` ### **月または四半期の経過日数** ``` days in Q3 | 92 days days in February 2020 | 29 days ``` ### 2つの日付の中間点を見つける ``` midpoint between March 12 and April 5 | 24 March halfway between today and next Thursday | 13 September ``` ## カレンダー計算における曖昧さに関する注意点 **曖昧な月** 日や週とは異なり、月は秒単位で明確に定義されていません。Soulverは、与えられた式に基づいて最も論理的な処理を試みます。うるう年やその他のカレンダーの特異点を考慮するのが得意です: ``` Feb 28 + 1 month | 28 March January 31 2020 + 1 month | February 29 2020 ``` **年が指定されていない日付** 年が指定されていない日付は、現在の年または翌年のいずれかを使用する場合があります。 ``` # In December 2019 // next year is assumed, as the nearest January is in the future January 12 + 3 weeks | 2 February 2020 // this year is assumed, as the month is still recently in the past November 1 - 5 days | 27 October 2019 ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://documentation.soulver.app/ja/rifarensu/dates/dates-and-times.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.