Date to timestamp (macOS)

date-to-ts.sh

#!/bin/bash

# Convert given date to timestamp
# Date format: YYYY-MM-DD (2020-02-28)
# If no argument given use current date

CURDATE=`date +%F`
DATE=${1:-$CURDATE}

echo "Arg/Cur: $DATE"

IFS=-
set $DATE
YEAR=$1
MONTH=$2
DAY=$3

echo "Parsed: $YEAR/$MONTH/$DAY"

echo Date $DATE timestamp:
TS=`date -j $MONTH$DAY$YEAR +"%s"`

echo $TS
echo ${TS}000