BuildInfo.txt contains information about the build of the game, including when it was built and the SVN version number.
It usually looks like this: (example from Super Mario 3D World + Bowser's Fury)
Change 924546 on 2020/11/25 13:28:12 by p4_jenkins_build@Jenkins_RedCarpet-S_ContBuild 'RedCarpet-S - Automated Latest_' END_LINE_CODE Monitor All SVN 1887