Good news! We've redesigned the leave type settings page. While we were in there we added this: 

Each and every leave type can now be set to show as "Busy" or "Available" in external calendars. Google Calendar, iCal, Outlook - anywhere you can send an iCal feed.

This will only affect external calendars and won't change anything in Timetastic for that leave type. A few (thousand) of you requested it so we hope this helps you organise your leave types better. Calendars can take a few minutes to update after changing availability while we sync up all the bookings in the background

API consumers will also see this in new fields, check the API docs for more info.

Stay tuned for more updates.