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

Question

On Linux you can convert a date like \"2010-10-02\" to a unix timestamp in shell script by

date -d \"2010-10-02\" \"+%s\"

Since Mac OS does not

Answer 1

I used the following on Mac OSX.

currDate=`date +%Y%m%d`
epochDate=$(date -j -f "%Y%m%d" "${currDate}" "+%s")