class Rufus::Scheduler::CronLine

def monthdays(date)
  pos = 1
  d = date.dup
  loop do
    d = d - WEEK_S
    break if d.month != date.month
    pos = pos + 1
  end
  neg = -1
  d = date.dup
  loop do
    d = d + WEEK_S
    break if d.month != date.month
    neg = neg - 1
  end
  [ "#{date.wday}##{pos}", "#{date.wday}##{neg}" ]
end