module DateAndTime::Calculations

def all_week(start_day = Date.beginning_of_week)

Week starts on start_day, default is Date.week_start or config.week_start when set.
Returns a Range representing the whole week of the current date/time. 
def all_week(start_day = Date.beginning_of_week)
  beginning_of_week(start_day)..end_of_week(start_day)
end