D15309: [Calendar] Wrap day name index around

[Kai Uwe Broulik]

broulik added a reviewer: Zren.

REPOSITORY
  R242 Plasma Framework (Library)

REVISION DETAIL
  https://phabricator.kde.org/D15309

To: broulik, #plasma, Zren
Cc: kde-frameworks-devel, michaelh, ngraham, bruns