Grand sake tasting: Join Japanese masters to taste world-famous sake, shochu and beer. Proceeds support the festival. Tickets are $100 per person. 7-9 p.m. Carnegie Library, 801 K St. NW. Metro: Mount Vernon Square.

Lecture by author Ann McClellan: McClellan will provide insight into the Japanese gift of cherry trees as a symbol of the friendship between Japan and United States, and she will highlight the Library of Congress’s diverse related resources. 11 a.m.-1 p.m. Library of Congress, Thomas Jefferson Building, Whittall Pavilion, 10 First St. SE.

Day of Zen: Participate in a day of total relaxation, including soothing harp music, refreshments, massages, manicures, skin care consultations and more. 5:30-7:30 p.m. Macy’s Metro Center, 1201 G St. NW. Metro: Smithsonian