Good catch, I just ran it verbatim in iTerm2 on macOs:
replydate -u -d @1775060800
date: illegal option -- d
btw. how do you format commands in a HN comment correctly?
Start the line indented with two or more spaces [1]
replydate -u -d @1775060800
date: illegal option -- d
btw. how do you format commands in a HN comment correctly?