Not for immediate action, just to keep a record of it for the case if someone will eventually push it through. Way to reproduce: $ TZ=Europe/Helsinki date -d '1942-04-03' The same spell works for 1942-04-02 and 1942-04-04. Similar problem as in https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=695005 (from 2012) still reproducible via $ TZ=Europe/Budapest date -d '1954-05-23' The workarounds in that report are still valid. TL;DR: use 'date -u' instead of just 'date'. Thank you! BR, Rostislav