I know the California law is 30 days notice, but what if the landlord added to the lease "30 days notice from the 1st of the month." Is she allowed to override California law?

Only if she gave you the "30 days notice" on the 1st of the month. Otherwise, it's 30 days from whenever she gave you the notice, I believe. It might be good to check the Landlord/Tenant laws in your state to see if there is any way she might be able to bypass that law.

30 day notice is commonly considered from date the rent is due.
So if the normal due date for rent is the 1st, this should be considered within their rights. Sinice it is giving 30 days.

If your rent is due on another date ( 15, or 20th) then one could argue the point

Yes, she is allowed to override California law. As long as it appears in the written lease and you agreed to it by signing it, it is legal.

I know the California law is 30 days notice, but what if the landlord added to the lease "30 days notice from the 1st of the month." Is she allowed to override california law?
I thought that was the case. Thanks for the confirmation.