Longwood Gardens’ is holding a weather-themed Fireworks & Fountains show during Labor Day weekend. Dubbed “It’s Always Sunny at Longwood Gardens,” the show features songs ranging from Electric Light Orchestra’s “Mr. Blue Sky” to The Beatles’ “Good Day Sunshine.” The fun begins at 8:15 p.m. on Sunday, Sept. 5, at the Chester County venue. Lawn tickets are available for $45 for ages 19 and older and $25 for those 18 and younger, but you’ll need to bring chairs. Blankets are not permitted on the grounds.