previous_period_end

# File lib/logger.rb, line 552
    def previous_period_end(now, shift_age)
      case shift_age
      when /^daily$/
        t = Time.mktime(now.year, now.month, now.mday) - SiD / 2
      when /^weekly$/
        t = Time.mktime(now.year, now.month, now.mday) - (SiD * (now.wday + 1) + SiD / 2)
      when /^monthly$/
        t = Time.mktime(now.year, now.month, 1) - SiD / 2
      else
        return now
      end
      Time.mktime(t.year, t.month, t.mday, 23, 59, 59)
    end