tags 5783 fixed close 5783 stop triaging very old bug: https://debbugs.gnu.org/5783 and https://savannah.gnu.org/bugs/?29349 .
In 2016, Paul committed the following: ls: fix %%b format and precompute more https://git.savannah.gnu.org/cgit/coreutils.git/commit/?id=1db94ee969b984bbd00b97c6abbe2f69db8e0000 Which I believe fixes the ls/month issue (compare the commit with the suggested patch from 2010: https://savannah.gnu.org/bugs/download.php?file_id=20037 ). As such, I'm closing this bug (if that's wrong, re-open it). Discussion can continue by replying to this thread. -assaf