Los Altos High School will commemorate its 50th anniversary with a three-day celebration, May 20-22. Tickets for the event are available on alumni and school Web sites.

The weekend begins May 20 with a tribute to George Gershwin and a golf tournament. Prizes will be awarded at the 19th hole, where appetizers and no-host cocktails will be served. A family carnival and alumni swim meet are scheduled May 21. The main alumni event, set for the evening of May 21, is a street party in downtown Los Altos on Main Street, which will be closed for a night of food, drinks and music. Forty-five alumni classes have been invited. A concert on the LAHS green is slated for May 22.

For more information or to purchase tickets, log on to

www.losaltoshsalumni.org.