Bash Today, Yesterday, Tomorrow

HARI INI/TODAY:
#get today's date
export TZ=Asia/Jakarta
TAHUNBULAN=$(date --date='0 days' '+%Y%m')
TODAY=$(date --date='0 days' '+%Y%m%d')
TODAYGARIS=$(date --date='0 days' '+%Y-%m-%d')

KEMARIN/YESTERDAY:
#get today's date
export TZ=Asia/Jakarta
TAHUNBULAN=$(date --date='-1 days' '+%Y%m')
TODAY=$(date --date='-1 days' '+%Y%m%d')
TODAYGARIS=$(date --date='-1 days' '+%Y-%m-%d')

ESOK/TOMORROW:
#get today's date
export TZ=Asia/Jakarta
TAHUNBULAN=$(date --date='1 days' '+%Y%m')
TODAY=$(date --date='1 days' '+%Y%m%d')
TODAYGARIS=$(date --date='1 days' '+%Y-%m-%d')