A good calendar wallpaper app

A simple yet powerful app that does what it says: it allows you to build custom lock screen wallpapers with your own calendar printed on.
I like the fact that its optimized for my iPhone 5!
But I would appreciate if one could choose the first day of the week, eg not necessarily Sundays but Mondays also for instance

Haut Pignon about My Wallpaper Calendar, v2.11