If you have booked an absence which has not yet been taken, you may remove it from your calendar by going to the “Holidays/Absences” link at the top of the page, navigating to the absence on your absence calendar and clicking on it.
The absence details page that displays shows the current details of the booked absence. To remove it, click on the “Cancel Absence” button at the bottom of the page. A confirmation message is shown asking you to confirm that you wish to remove the absence. Clicking on “Delete” removes the absence from your calendar.