Rambam, Mishneh Torah: Lanlord-Tenant Law 6:7

A landlord may not evict their tenant without providing 30 days notice in order for them to seek a place so that they should not be cast out on the street, and after 30 days the tenant should leave. This is correct during the summer months, but during the rainy season the landlord cannot evict the tenant from Sukkot until Pesach[Aprox. 6 months, the duration of the rainy season]. [In a case where] the landlord stipulated that the tenant should leave 30 days before Sukkot, [but the tenant] stays longer than 30 days-- even one day after Sukkot-- the landlord cannot evict the tenant until after Pesach, and must inform the tenant 30 days in advance. This is correct for small towns but in big cities the summer months and rainy season follow a uniform principle: the landlord must provide 12 months notice.