There is an option Block Days, found in Personnel > Functions, that allows you to book a group of employees (Note: as specified by a query on the first page of the wizard), to be absent on a range of dates (Note: as specified on pages 2 and 3 of the wizard).
The Absence Type is specified on page 4 on the wizard.
The Absence Analysis is specified on page 5 of the wizard.
A Description can be entered on page 6.
An alternative message is create a spreadsheet of the data and import it via the Authorisation Centre.