Console : Configuring Management Settings

Deleting Schedules
You can delete custom schedules, but you cannot delete the default Work Hours, After Hours, or Weekend Hours schedules.
To delete individual schedule objects that you created, perform the following steps:
1
To delete existing days and times from the Schedule List, select the row and click Delete Schedule(s). Or, to delete all existing schedules, click the check box next to Name and then click Delete Schedule(s).