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插入相对日期和时间规范？

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插入相对日期和时间规范？

我如何指定一个相对日期并让 LaTeX 插入生成的绝对日期？

例如这样：

\somedatecommand{next thursday}

其结果应为：

Thursday, 20.10.2011

或者：

20.10.2011

对 Babel 的支持也很好（例如对于非英语文档）。

答案1

你可以使用包裹datetime​格式化日期并引用包文档：

从 2.42 版本开始，datetime 包现在与 babel 兼容，但是您必须在 babel 包之后加载 datetime 包。

较难的部分是确定要打印的日期。这可以使用\AdvanceDate[n]以下宏来实现包裹advdate​将日期提前指定的天数。然后只需确定我们需要提前多少天才能达到“下一周的某一天”。

要从当前日期以外的某一天开始，可以使用\SetDate[dd/mm/yyyy]。

在此处输入图片描述

\documentclass{article}
\usepackage{xstring}% Needed for \IfStrEqCase
\usepackage{datenumber}% Date formatting
\usepackage{advdate}% Needed for \AdvanceDate
\usepackage{pgf}% For math
\usepackage[ddmmyyyy]{datetime}
\newdateformat{mydate}{\twodigit{\THEDAY}.\twodigit{\THEMONTH}.\THEYEAR}

\newcounter{dateOffset}%
\newcommand*{\SetDateOffsetForNext}[1]{%
\pgfmathsetcounter{dateOffset}{7-int(\the\value{datedayname})}% Initialize
\IfStrEqCase{#1}{%
    {mon}{\pgfmathsetcounter{dateOffset}{int(mod(\the\value{dateOffset}+1,7))}}%
    {tue}{\pgfmathsetcounter{dateOffset}{int(mod(\the\value{dateOffset}+2,7))}}%
    {wed}{\pgfmathsetcounter{dateOffset}{int(mod(\the\value{dateOffset}+3,7))}}%
    {thu}{\pgfmathsetcounter{dateOffset}{int(mod(\the\value{dateOffset}+4,7))}}%
    {fri}{\pgfmathsetcounter{dateOffset}{int(mod(\the\value{dateOffset}+5,7))}}%
    {sat}{\pgfmathsetcounter{dateOffset}{int(mod(\the\value{dateOffset}+6,7))}}%
    {sun}{\pgfmathsetcounter{dateOffset}{int(mod(\the\value{dateOffset}+7,7))}}%
    }[\PackageError{\SetDateOffsetForNext}{Do not know "#1" as day of week}{}]%
    \IfEq{\the\value{dateOffset}}{0}{\pgfmathsetcounter{dateOffset}{7}}{}%
}%

\newcommand*{\PrintDateForNext}[1]{%
    \SetDateOffsetForNext{#1}% Determine date offset
    \AdvanceDate[\value{dateOffset}]% Advance to specified day
    \mydate\today% Print specified date
    \AdvanceDate[-\value{dateOffset}]% Restore current day
    is next #1\par% debug output
}

\begin{document}
\noindent
Working from current day:
Today is \mydate\today\par
\PrintDateForNext{mon}\par
\PrintDateForNext{tue}\par
\PrintDateForNext{wed}\par
\PrintDateForNext{thu}\par
\PrintDateForNext{fri}\par
\PrintDateForNext{sat}\par
\PrintDateForNext{sun}\par

\bigskip\noindent
Back to ``May the Fourth Be With You":
\SetDate[04/05/1977]% dd/mm/yyyy
Today is \mydate\today\par
\PrintDateForNext{mon}\par
\PrintDateForNext{tue}\par
\PrintDateForNext{wed}\par
\PrintDateForNext{thu}\par
\PrintDateForNext{fri}\par
\PrintDateForNext{sat}\par
\PrintDateForNext{sun}\par
\end{document}

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