date

1
date  --date="STRING"
date  --date="next Friday"
date  -d "2 days ago"
date  --date="yesterday"
date  --date="yesterday" +"%format"
# Get yesterday's date in dd-mm-yy format
date  --date="yesterday" +"%d-%m-%y"
date  -d "yesterday" +"%m-%d-%y" # US date format
date  --date="yesterday" +"%Y-%m-%d" # YYYY-mm-dd format
## store y'day date in a shell variable called yday and display it ##
yday=$(date  --date="yesterday" +"%Y-%m-%d")
echo "$yday"


date -d 'now -20 hours'

read timestamp

1
date -d @1674634504
mercredi 25 janvier 2023, 09:15:04 (UTC+0100)