# 日历计算 ### 从日期增加或减去时间 ``` 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 ``` ### 获取相对于当前日期的日期 ``` today + 3 weeks | 1 October now − 1 month | 5 May 4 days from now | 14 September 3 days ago | 7 September ``` ### **查找两个日期之间的时间量** ``` 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" %} 时间间隔是从第一个日期的中午到最后一个日期的中午计算的。 如果您想将起始和结束日期都包含在间隔内，请使用包含间隔函数（参见 [下面](#inclusive-intervals-of-time-1)） {% endhint %} ### 两个日期之间的包含时间间隔 ``` April 1 through April 30 in days | 30 days ``` ### 周数（ISO 8601） ``` week of year | 36 week number on march 12, 2021 | 10 ``` ### **一个月或一个季度有多少天** ``` days in Q3 | 92 days days in February 2020 | 29 days ``` ### 查找两个日期之间的中点 ``` midpoint between March 12 and April 5 | 24 March halfway between today and next Thursday | 13 September ``` ## 关于日历计算歧义性的说明 **模糊的月份** 与天和周不同，月份在秒的定义上并不明确。Soulver 会根据表达式尝试执行最合乎逻辑的操作。它很擅长考虑到闰年和其他日历的特殊情况： ``` Feb 28 + 1 month | 28 March January 31 2020 + 1 month | February 29 2020 ``` **未指定年份的日期** 没有指定年份的日期可能会使用当前年份或下一年。 ``` # In December 2019 // 假设下一年，因为最近的一月在未来 January 12 + 3 weeks | 2 February 2020 // 假设今年，因为月份仍然在近期过去 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/zh/yu-fa-can-kao/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.