April 27th is officially Dynamic Range Day. The purpose of the day is to prevent too much compression and limiting.
Boz Digital Labs has a special deal, here's what they say:
What better time than to sell our best limiter, The Wall? We figure a great one-day-only deal for $29 is just about the best way to celebrate this most peculiar holiday. This is most assuredly a one-day-only sale, April 27th is the beginning AND end of the sale, so act quickly.