A regular schedule refers to a routine or pattern that is followed consistently and predictably. It could refer to a set time, frequency or sequence of events that occur at fixed intervals or according to plan. For example, a person may have a regular schedule for waking up in the morning, going to work, exercising, eating meals, etc., where each activity is performed at the same time every day. In contrast, an irregular schedule would be one with no set pattern or timing, and could vary from day-to-day.