Also known as a visitation schedule, it is designed for people who have reached an agreement regarding the terms of their separation. Custody calendars can be written or online. An ideal visitation calendar outlines the scheduled standard visitation times, designates where the children will be during holidays, school breaks, and summer vacation, and allows parents to make any changes to the schedule as the need arises. Online custody calendars make it easier for parents to keep track of custody arrangements and visitation times because it is so accessible.