Interval type Jobs can have their schedule rules augmented in four ways:
An arbitrary number of days can be added to the schedule.
An arbitrary number of date ranges that will be excluded. Excluded date range take precedence over any included dates.
You can select the days of the Week that the Job will not run. Included days take precedence over this rule.
You can select the times of the day that the Job will be excluded. So, for example, if 1:00PM - 5:00PM is excluded, then the Job will not be allowed to run during that time range on any day of the week. Included days take precedence over this rule.