Hello,
Having a boolean .weekend? on the Date class would be a good feature. It will basically do this:
saturday? || sunday?
Makes the code cleaner and easier to read.
This introduces a localization issue – not everyone has a Saturday/Sunday weekend! Particularly Islamic countries: http://en.wikipedia.org/wiki/Workweek_and_weekend#Islamic_countries but also Israel, Nepal, India, and others.
Seeing as "beginning_of_week" allows for configuration of the week start day, it doesn't seem like a huge leap to have configuration for the start and end days of a weekend, with default values identifying Saturday and Sunday.
But frankly I'd think this was more of a personal mix-in than a core feature.
