Happy Pi day to applied scientists!

Question

Happy Pi day to all non-American applied mathematicians and scientists (like me) who make approximations!

This is in fact TeX related as I have a question, or perhaps a puzzle. How would I make the equation

$\pi \approx \today$

give the output that makes sense, given the appropriate formatting of today's date. Furthermore, suppose the equation were typeset tomorrow, one might like it to output `\pi \neq \today', if you see what I mean. And if it were typeset on March 14, it might give yet a different answer. I'm afraid I don't have any MWEs for these.

Answer 1

You are a bit late, aren't you? ;-) See here for funny posts along these lines. Just kidding. ;-)

Here is something like a more serious answer, based on Heiko's answer here.

\documentclass{article}
\makeatletter
\edef\mydate{% based on https://tex.stackexchange.com/a/422050/121799
  \two@digits\month
  \two@digits\day
}
\makeatother
\begin{document}
\def\piday{0314}
\ifx\mydate\piday%
happy $\pi$ day
\else
sorry, not a $\pi$ day
\fi
\end{document}

OK, here for Europeans. (Sorry for loading TikZ, which is not at all necessary here but I happen to love it. ;-)

\documentclass{article}
\usepackage{tikz}
\makeatletter
\edef\myday{% based on https://tex.stackexchange.com/a/422050/121799
  \two@digits\day
}
\edef\mymonth{
  \two@digits\month
}
\makeatother
\begin{document}
\pgfmathtruncatemacro{\test}{100*\myday/\mymonth}
\def\mypi{314}
\ifx\test\mypi%
happy European $\pi$ day
\else
sorry, not a European $\pi$ day
\fi
\end{document}