[Tex/LaTex] How to change the year 1991 to 2020 of Mathematics Subject Classification in amsart

amsart

\documentclass[12pt, reqno]{amsart}
\usepackage{amsmath, amsthm, amscd, amsfonts, amssymb, graphicx, color}
\usepackage[bookmarksnumbered, colorlinks, plainpages]{hyperref}

\textheight 22.5truecm \textwidth 14.5truecm
\setlength{\oddsidemargin}{0.35in}\setlength{\evensidemargin}{0.35in}

\setlength{\topmargin}{-.5cm}
\begin{document}
\setcounter{page}{1}

\title[Short Title]{Title of Paper}
\author{}
\subjclass[2020]{Primary 39B82; Secondary 44B20, 46C05.}

\keywords{}
\end{document}

This is a model. While compiling it, the MSC is changed as 1991. Anyone please help me to resolve it.

Best Answer

Add the following in your preamble

\makeatletter
\@namedef{subjclassname@2020}{\textup{2020} Mathematics Subject Classification}
\makeatother
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