How to convert DATE to UNIX TIMESTAMP in shell script on MacOS

linux macos date shell

date +%s

This works fine for me on OS X Lion.

linux macos date shell

man date on OSX has this example

date -j -f "%a %b %d %T %Z %Y" "`date`" "+%s"

Which I think does what you want.

You can use this for a specific date

date -j -f "%a %b %d %T %Z %Y" "Tue Sep 28 19:35:15 EDT 2010" "+%s"

Or use whatever format you want.

linux macos date shell

date -j -f "%Y-%m-%d" "2010-10-02" "+%s"

CodeHunter