I was wondering if there is a way to manually set what

I was wondering if there is a way to manually set what times a user is available for an appointment each day. For example on a certain Monday they may just be available from 10am-12pm and 1:30-3:00. However on a certain Tuesday they may be available from 8am -9:15am and 11:30am – 3:45pm. Is there a simple way to customize a schedule for each day?

Thank you.

Chris