How many days of notification does a landlord have to give before raising the rent?

Yes. If the rent is on a written lease then the lease must expire, and the landlord must give at least 30-days notice before the lease expires. If the rent is on a month-to-month basis, then the landlord must give a 30-day notice before the next rent is due. If the rent is on a weekly basis then the notice must be given at least one week before the rent is due.