The Naperville Park District’s Centennial Beach is gearing up for their opening day on May 23. Lifeguards are in training and staff is preparing for a busy season ahead, especially considering the newly introduced swimming hours. “We have added a new after 5 p.m. for beach members and it’s great for working families, for people who work during the day and can come after 5 p.m. and then it’s also available anytime on the weekends so that’s a nice enhancement as well,” said Sameera Luthman, Marketing Director with the Naperville Park District. 2015 pre-season passes for the beach are currently on sale at a discounted rate of 20% off, now until Friday, May 22. Naperville News 17's Alyssa Bochenek Reports.