Tap on Copy (right corner) > Week and follow the steps on the wizard.
Here is a short video
Configuring your calendarThe first time you open the calendar view it will ask for its start/end dates. A calendar must comprise all the terms for a given academic year (e.g. from Aug 2015 to July 2016).
If you're working on a two week scheduleMake sure you select 2 week copy in the calendar copy wizard. If your cycle sequence is reset after half term holidays only need to use the copy wizard with the new dates and a different selection of weeks (i.e. select week B first, instead of A).
Related articlesHow to: Configure a week in the calendar
Configuring your Schedule (full-size mode)