In the staff setup page, you can define your staff member's specific hours if they are different from your regular operating hours.
If they are not in a particular location on any day, you can define their hours as closed for the day.
Using the left navigation menu, go to > Setup > Staff > press the '...' button > Edit > Hours tab > Fine-tune hours for specific days
Select the required dates and the time staff will be available.
Staff can also filter their hours directly from the Calendar
In the Calendar select the staff from the left side of screen.
A clock icon will now appear next to each date and this feature will allow the staff to filter their hours.