THROUGH AUG. 31 NEW YORK "Philip Guston: Works on Paper": Guston has a unique place in 20th-century American art. A leading figure among the Abstract Expressionist school of painters, Guston (1913-80) returned to representational art in the final decade of his life. Although the change was controversial at the time, his late work has proved enormously influential. Throughout his career, Guston drew. "It is the bareness of drawing that I like," he once said. "The act of drawing is what locates, suggests, discovers." This exhibition at the Morgan Library & Museum gathers some 100 examples of his draftsmanship, taken from the 1940s until the year of his death. 225 Madison Ave., 212-685-0008, themorgan.org.
JUNE 13-29 ALDEBURGH, ENGLAND Aldeburgh Festival: Founded in 1948 by the composer Benjamin Britten, Aldeburgh long ago became one of Europe's best-known summer music festivals. A highlight of this year's program is the world premiere of Yannis Kyriakides's opera "An Ocean of Rain." 011-44-1728-687110, aldeburgh.co.uk.
THROUGH MAY 2009 MOUNTAIN VALLEY, CALIF. Charles Babbage's Difference Engine No. 2: Babbage (1791-1871), a Victorian polymath, designed the first automated computing engine 160 years ago, though it remained unbuilt until 2002. This actual working model at the Computer History Museum is 11 feet long, 7 feet high, weighs five tons, and has 8,000 working parts. 1401 North Shoreline Blvd., 650-810-1010, computerhistory.org.
THROUGH NOV. 1 LONDON "Marguerite": This musical tale of tormented love in Nazi-occupied Paris at the Theatre Royal Haymarket is a world premiere production that updates Alexandre Dumas's "La Dame aux Camélias." The composer is legendary Michel Legrand. Haymarket, 011-44-20-7930-8890, trh.co.uk.
JUNE 21-SEPT. 7 WASHINGTON, D.C. "Diebenkorn in New Mexico": Richard Diebenkorn, whose "Ocean Park" series is one of the glories of American painting, is most closely associated with California. From 1950-52, he lived in Albuquerque, and this exhibit at the Phillips Collection examines this pivotal period in his career. 1600 21st St. NW, 202-387-2151, phillipscollection.org.
JUNE 26-JULY 6 MONTREAL Montreal Jazz Festival: This year's festival is dedicated to the memory of the late jazz great (and Montreal native) Oscar Peterson. Among the 3,000 musicians scheduled to appear are Woody Allen, Aretha Franklin, Abbey Lincoln, David Murray, Steely Dan, the Wailers, and Return to Forever. 888-515-0515, montrealjazzfest.com.
PLAN AHEAD JULY 9-AUG. 17 Ravinia Festival: If Tanglewood isn't far enough west for you, there's always Ravinia in Highland Park, Ill., the summer home of the Chicago Symphony Orchestra. Highlights of the upcoming CSO residency include performances of two Mozart operas, "The Abduction from the Seraglio" and "Don Giovanni." 418 Sheridan Road, 847-266-5100, ravinia.org.
MARK FEENEY
Events are sometimes canceled, rescheduled, or sold out; call or check online to confirm. Mark Feeney can be reached at mfeeney@globe.com.
