Hello The usual case is:
$ echo "2023-03-27 08:30:00" > dates.txt $ echo "2023-04-01 12:00:00" >> dates.txt $ /usr/bin/date -f dates.txt Mon Mar 27 08:30:00 CEST 2023 Sat Apr 1 12:00:00 CEST 2023 If done on a non existing file, we get: $ date -f non-existing /usr/bin/date: non-existing: No such file or directory Maybe it should do the same on a directory: $ /usr/bin/date -f / doesn't show anything and return 0 Cheers, Sylvestre