What does 'one full weekend off per month' mean?

Providing your au pair with a full weekend off means that from early Friday evening until work begins on Monday, the au pair is not required to provide active or passive childcare. Full weekends off should always be scheduled well in advance allowing your au pair to plan ahead and make full use of free time. Host families should not expect an au pair to change their plans for a full weekend off at the last minute due to changes in the family’s schedule. Planning well in advance, and communicating clearly what the schedule is, will allow everyone to plan appropriately.