macOS, 날짜 연산 쉘스크립트

#!/bin/bash

:<<END
YEAR=`date +%Y`
MONTH=`date +%m`
DAY=`date +%d`
HOUR=`date +%H`
END


_YEAR=`date -v-9H +"%Y"`
_MONTH=`date -v-9H +"%m"`
_DAY=`date -v-9H +"%d"`
_HOUR=`date -v-9H +"%H"`

echo ${_YEAR}${_MONTH}${_DAY}${_HOUR}
#echo ${YEAR}${MONTH}${DAY}${HOUR}


cd /Users/macmini03/Desktop/restapi
python3 restapi.py ${_YEAR} ${_MONTH} ${_DAY} ${_HOUR}