What are the dates for apartment 585 ? | Did you mean the booking start and end dates of the apartments with id 585? | Yes
SELECT T1.booking_start_date ,  T1.booking_start_date FROM Apartment_Bookings AS T1 JOIN Apartments AS T2 ON T1.apt_id   =   T2.apt_id WHERE t2.apt_number  =  "Apt. 585"
dates for apartment = booking start and end dates; apartment id or number refers to apt_id in Apartments table and is used to join with the Apartment_Bookings table;