macOS - time machine lastest backup date/time

Does anyone know how to find out the last time machine backup time and date?

I found this article but the command doesn’t not work.

https://superuser.com/questions/356901/when-was-the-latest-successful-time-machine-backup

defaults read /private/var/db/.TimeMachine.Results BACKUP_COMPLETED_DATE

Does not produce the same date as what is in the system preferences.

thanks

The command line interface tmutil has all information about Time Machine

do shell script "tmutil latestbackup"

The man page says Requires root and Full Disk Access privileges but on my machine it works at least without adding with administrator privileges

Thanks for the reply.