This year marks the 40th anniversary of the pajama party known as the Sunrise Sale in downtown St. Petersburg. With a nod to the event's start in 1973, there will be special discounts for attendees sporting tie-dye and '70s garb along with the traditional pajamas. Shopping begins at downtown stores at 6:43 a.m. Thursday. More than 30 businesses will offer specials and the Downtown Looper Trolley will provide free rides from 7 to 10 a.m. along Beach Drive NE, expanding outward from there. Many merchants will offer coffee and other treats. Sales continue through 5 p.m. at participating businesses. A new feature: Downtown businesses will be collecting pantry items and paper products for the Ronald McDonald House.