ANSI date numbers starts from January 1st 1601 (day 1).
So how to get the following to work in a bash command in Linux?
# ANSI / UNIX epoch delta is 134774 days
$ date -ud ‘1601 -01 -01 + 134774 days ’ +%F
1970 -01 -01
date: invalid date '1601-01-01+134774 days'
To answer my own question as I meanwhile found this site: http://unix.stackexchange.com/questions/7688/date-years-prior-to-1901-are-treated-as-invalid
It's because I'm on a 32-bit machine.
date -ud '1901-12-14 + 24855 days' +%F