Before you offer up your evenings and weekends, be sure that you are clear on what they need from you for this position. Typically the hours are laid out in the job description, but if it only says "part-time" or "full-time," you may want to respond first with, "What hours do you need me to work?" Once the interviewer has laid out the expectations, you can tell them, "That sounds great! I'm available on those days, and I can offer my weekends if I am needed as well."
You want to show them that you're excited about the job and that you are willing to make yourself available to work when they need you.
"I am available most days, evenings, and weekends. I do have an obligation on Tuesday evenings, but aside from that, I should be available most times. Can you clarify for me the hours for this position?"
"I see that you are open Monday to Friday from 8 am - 8 pm. Could you share with me the ideal schedule for your managers? I would like to, of course, be able to cover the peak traffic times for your business."
"My schedule can be flexible and fluid. I understand that your clients may need a deadline pushed which requires work in the evenings or on weekends. Since the majority of this job would require me to be on a laptop, I am confident that I can deliver the work when needed, even if it's remote."
"I am available to work any evening and all weekends. I am a second-year University student and my courses this semester are primarily in the mornings and early afternoons."
"I am eager for this opportunity and understand that, aside from regular business hours, I may need to take client calls in the off-hours. I am okay with that and will make myself available as necessary, to be successful in this role."
"I understand that your bell rings at 8:40 AM and 3:20 PM. I plan to be at school at least 30 minutes before school starts and will stay as late as needed to complete my work. If you are looking for an extra-curricular commitment, I am certainly open to discussing that as well."
"As you know, I am currently employed. As such, I am available to start a new position two weeks upon having resigned from my current position."
"I am available to work any type of shift in this inpatient practice, but I just need to know what a schedule looks like with a week's advance in time. My commitments outside of work would just need to know."
"What hours or shifts are available?"