In recent days we’ve discovered a glitch that sometimes prevents longer events from appearing on the calendar.  I.e. If a person books off 2 weeks for a vacation the first couple days appear booked off on the calendar, but the rest of the period appears unscheduled.

We are currently investigating the source of this glitch and will add the news of it being fixed to an upcoming release announcement. In the meantime, a successful workaround is to create a repeated event as “daily”, then go to the day the employee comes back (the day after the vacation), click on the event and choose "Delete this and future events".