Each person has their own scheduling needs, and it is important to be candid with the interviewer about your availability. Begin by telling the interviewer if you are seeking full-time or part-time hours. Then, define what days/times you are available for work. You might state something like this, "I am looking for a full-time schedule hopefully working Monday-Friday 8:00 a.m. - 5:00 p.m. I am available to work later into the evenings, and I am happy to come in on an occasional to weekend to help out when necessary."