Bash datetime
From wikinotes
WARNING:
Date is not a feature of bash, but part of the gnu or bsd coreutils. That means that it is not as portable as you might like.
date parsing
gnu-coreutils
date -d "2 days ago" date -d "thursday" date -d "last thursday"bsd-coreutils
date formatting
gnu-coreutils
date '+%d/%m/%Y %H:%M:%S' #> 01/09/2018 10:00:00bsd-coreutils