In Ca, how many days do I need to give notice for a tenant to move out?

So I was managing my parents property and they want to move back in. How many days do I need to give to the tenant? First time I have to get a tenant out. They usually are the ones giving me their 30 days notice to move out.

Edit: Also, these tenants have been there for over a year, if that helps.

Edit: Nevermind. Just found the answer on google. Lock please.