You might not want people to be able to book with you at the last minute or too far in advance. Appointlet's required notice setting will allow you to define the rules for when people can schedule with you.
Begin by navigating to your Scheduling Pages and click on the meeting type that you want to edit.
From here, select the Scheduling Rules option from the left navigation menu. The second option on the list is Required Notice.
Use minimum notice to define the shortest period of time when someone can book with you. In other words "Do not let someone book me with less than X amount of notice".
Use maximum notice to define the furthest time in the future when someone should be able to schedule you. In other words "Do not let someone book me more than X days in advance"
Be sure to save changes when you're finished!