restore my Mabook to previous date

Depending on your meaning, one reference could be to restore from earlier Time Machine backup.

Several examples of this idea may be found, by reading through Search results here:

https://duckduckgo.com/?t=ffab&q=restore+previous+system+with+Time+Machine+macOS&ia=web

(from above search ~ dozens of articles are so linked)

• Restore your Mac from a backup - Apple Support

https://support.apple.com/en-us/HT203981

Other ways to restore to a previous date, or state; maybe an earlier version macOS?

Please define exactly the proposed state or where you need help.