Holiday and custom absence requests can be submitted as full or half days. Staff can request set times allowing them to take the exact amount of hours required if your company settings allow. 

To manage this settings, navigate to your company settings and open the holidays tab. Under the holiday section of this tab, you will find a how holidays can be booked option.

Select full or half days only if you don't want your staff to be able to book set time absences. When full or half days only is selected, you will be given the option to start restricting bookings on a specific date. 

If you would like your staff to be able to select the start and end time of their absences in addition to having the option for full and half day bookings, select by set times.