This year's Twilight Summer Concert Series is here! Thursday, June 27, featuring the Celtic Pipes and Drums. At 5 p.m. join us for a Patriotic Sing Along. Enjoy a free admission between 4:30 - 7 p.m. The Twilight Summer Concert Series at the Foster Botanical Garden is a perfect way to enjoy Hawaii's ideal summer climate, lush tropical beauty, and fun Honolulu entertainment - all for free!