CCS fortnights run on a fixed schedule that starts on the first Monday of the CCS financial year , ie the first Monday in July. For 2018 that was the 2nd of July.
That can have some bizarre consequences. If a vacation falls across the fortnight boundaries the parent may end up with double the hours (if they haven’t used any for ASC / BSC).
Below is the calendar for the remainder of 2018 grouped into CCS fortnights for your reference.