how to reset mac book pro to earlier

Hi,

Boot in Recovery mode(Shift+Option*Command+r) will be install macOS which comes with when you purchased your MacBook Pro.

https://support.apple.com/en-us/HT204904

What are you looking to do. It's pretty easy to backdate it via Date & Time Preferences. Just click on the current day/time and that should be one of the options.