how to autoupdate date on beamer pdf

Question

It is not uncommon (at least for me ) to compile pdf a day before. It is also not uncommon to use same pdf on some other day. So it would be handy if pdf produced displays the system date on which it is being played rather than compilation date. Is it possible?

This would involve changing the pdf file itself, or you would have to use JavaScript to fill form fields. I do not know how to change it otherwise. — , Feb 16 '14 at 12:50
I remember that I have written once a \tomorrow command, which was a real hack. — , Feb 16 '14 at 12:53
Already asked here, but without an answer (except those in comments): Presentation including today's date in beamer? — giordano, Feb 16 '14 at 13:18
In a similar question the tdclock package was suggested as a solution. Behind the scenes, it uses JS like @Christian says. — Crissov, Feb 16 '14 at 15:22
tdclock seem to provide exceptable solution. Including clock is easy, but uses significant processor resources if the update time is less. — Vaibhav, Feb 17 '14 at 09:24

score 5 · Answer 1 · answered Feb 16 '14 at 12:52

5

If you know the date you'll be showing the PDF, just include that date in the preamble:

\date{06/06/66}

answered Feb 16 '14 at 12:52

han-tyumi

1,152
8
17

score 3 · Answer 2 · 2017-03-24T16:04:15.940

It is not a real solution, but if you compile your document the day before, you can use following code to get a \Tomorrow command (please put it and the relevant packages into a separate .sty file if needed)

\documentclass{article}
\usepackage{datetime}
\usepackage{etoolbox} 
\usepackage{calculator}

\makeatletter


\newif\ifIsLeapYear\IsLeapYearfalse

\newcommand*{\YearIsLeapYear}[1]{%
\IsLeapYearfalse%
\MODULO{#1}{4}{\ModuloFourResult}%
\ifnumcomp{\ModuloFourResult}{=}{0}{%
\MODULO{#1}{100}{\ModuloOneHundredResult}%
   \ifnumcomp{\ModuloOneHundredResult}{=}{0}{%
\MODULO{#1}{400}{\ModuloFourHundredResult}%
   \ifnumcomp{\ModuloFourHundredResult}{=}{0}{%
      \IsLeapYeartrue%
}{%
      \IsLeapYearfalse%
}%
}{%
\IsLeapYeartrue% 
}}{\IsLeapYearfalse}%
}%




\newcounter{WorkSheet@@Day}%
\newcounter{WorkSheet@@Month}%
\newcounter{WorkSheet@@Year}%




\newcommand*{\WorkSheet@@SwitchToNextMonth}{%
  \setcounter{WorkSheet@@Day}{1}%
  \refstepcounter{WorkSheet@@Month}%
}%

\newcommand*{\WorkSheet@@SwitchToNextYear}{%
\setcounter{WorkSheet@@Day}{1}%
\setcounter{WorkSheet@@Month}{1}%
\refstepcounter{WorkSheet@@Year}%
}%

\newcommand*{\WorkSheetDayAfterDate}[3]{%
\setcounter{WorkSheet@@Day}{#1}%
\setcounter{WorkSheet@@Month}{#2}%
\setcounter{WorkSheet@@Year}{#3}%
%
\def\MonthsWithThirtyOneDays{1}%
\def\MonthsWithThirtyDays{4}%
%
%
\listadd{\MonthsWithThirtyOneDays}{1}%
\listadd{\MonthsWithThirtyOneDays}{3}%
\listadd{\MonthsWithThirtyOneDays}{5}%
\listadd{\MonthsWithThirtyOneDays}{7}%
\listadd{\MonthsWithThirtyOneDays}{8}%
\listadd{\MonthsWithThirtyOneDays}{10}%
\listadd{\MonthsWithThirtyOneDays}{12}%
%
\listadd{\MonthsWithThirtyDays}{4}%
\listadd{\MonthsWithThirtyDays}{6}%
\listadd{\MonthsWithThirtyDays}{9}%
\listadd{\MonthsWithThirtyDays}{11}%
\YearIsLeapYear{\number\value{WorkSheet@@Year}}%
\xifinlist{\number\value{WorkSheet@@Month}}{\MonthsWithThirtyOneDays}{%  It is a "long month"
%
\ifnumcomp{\value{WorkSheet@@Day}}{=}{31}{% Is the 31st day in the month!
% Check for 12/31/... 

\ifnumcomp{\value{WorkSheet@@Month}}{=}{12}{%
    \WorkSheet@@SwitchToNextYear}{ \WorkSheet@@SwitchToNextMonth}%
}{\refstepcounter{WorkSheet@@Day}}}{%

\ifnumcomp{\value{WorkSheet@@Month}}{=}{2}{% It is February
\ifnumcomp{\value{WorkSheet@@Day}}{=}{28}{% Is the 28th of February
\ifIsLeapYear%
\refstepcounter{WorkSheet@@Day}%
\else%
\WorkSheet@@SwitchToNextMonth%
\fi%
}{%
\ifIsLeapYear%
\ifnumcomp{\value{WorkSheet@@Day}}{=}{29}{% Is the 29th of February
\WorkSheet@@SwitchToNextMonth}{\refstepcounter{WorkSheet@@Day}}%
\else%
\refstepcounter{WorkSheet@@Day}%
\fi%
}}{%
% It is a month with 30 days!!
\xifinlist{\number\value{WorkSheet@@Month}}{\MonthsWithThirtyDays}{%
\ifnumcomp{\value{WorkSheet@@Day}}{=}{30}{% Is the 30st day in the month!
\WorkSheet@@SwitchToNextMonth}{\refstepcounter{WorkSheet@@Day}    

}}}{}%
}%
}%





\providecommand{\Tomorrow}{%
\WorkSheetDayAfterDate{\number\day}{\number\month}{\number\year}%
\newdate{DateOfTomorrow}{\number\value{WorkSheet@@Day}}{\number\value{WorkSheet@@Month}}{\number\value{WorkSheet@@Year}}%
\displaydate{DateOfTomorrow}
}%
\makeatother




\begin{document}
Tomorrow is \Tomorrow%
\end{document}

You can use the features of the datetime package in order to format the date according to your needs.

You still have to compile your document the day before, of course ;-)

score 2 · Accepted Answer · answered Feb 19 '14 at 09:37

This is just for the future visitors. tdclock package allows just what I expected. It only works with acrobat reader.

\documentclass{beamer}
\usetheme{madrid}
\usepackage[font=Times,timeinterval=10]{tdclock}
\title{Adding Current date}
\date{\tdclock}
\begin{document}
\initclock
\begin{frame}
\maketitle
\end{frame}
\begin{frame}{Ticking clock}\end{frame}
\end{document}

how to autoupdate date on beamer pdf

3 Answers3

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