You can enter the staff vacations in the Business Calendar.
1. Go to Settings
2. From the menu select business calendar
3. Click on the Circular Plus Icon button to add the staff vacation
4. Enter the details for the vacation and click on Add button to add it to the system. You can select All day if the staff is off for whole day or select only the specific hours staff member is off for.
Check Availability will take into account the staff vacation.
You can also select Staff vacation from the top of the calendar view to see who is on vacation that month.