Scheduling is a great way to create a rule that you want to take effect only during (or excluding) certain time periods. For instance, if you want to block all traffic after 10PM, then you can create a schedule that will permit the rule to do so.
Place a check in the Enable Scheduling checkbox.
Decide if you want the schedule to take place during a certain time period, or outside of a certain time period. Select either During or Excluding.
Select a month, day and beginning time from the pull-down lists, or leave the default settings, which will apply the rule schedule to all day, every day, all year.
If you have a beginning time, enter a duration for the rule's effect.
Click OK.