Define a `\DTMifdate` conditional using the `datetime2` package and `\today`

Question

I got a question regarding the usage of the datetime2 package. I want to set some due date and to define a certain date such as \paperdate which is either \today when it's before the due date or the due date itself. I tried this based on an example from the package's documentation:

\documentclass{article}
\usepackage[useregional, calc]{datetime2}
\begin{document}
\DTMsavedate{duedate}{2023-04-30}
\DTMifdate
{\today}
{at most=
\DTMfetchyear{duedate}-\DTMfetchmonth{duedate}-\DTMfetchday{duedate}}
{\newcommand\paperdate{\today}}{\newcommand\paperdate{\DTMusedate{duedate}}}
\end{document}

However, this code gives me the following error: Package datetime2-calc Error: Unknown date `2023-04-23'.

Would anyone know a workaround? Thanks in advance for your help!

score 1 · Answer 1 · answered Apr 23 '23 at 14:37

I found a solution myself! Based on the discussion How to calculate previous month from \today using datetime2? :

\usepackage[useregional, calc]{datetime2}
\begin{document}
\DTMsavenow{today}
\DTMsavedate{duedate}{2023-04-30}
\DTMifdate
{today}
{at most=
\DTMfetchyear{duedate}-\DTMfetchmonth{duedate}-\DTMfetchday{duedate}}
{\newcommand\paperdate{\today}}{\newcommand\paperdate{\DTMusedate{duedate}}}
\end{document}

Define a `\DTMifdate` conditional using the `datetime2` package and `\today`

1 Answers1