OVERNIGHT AT THE ZOO -- I know you've always wanted to spend the night in the mall -- well, this is second best. Drift gently off to sleep beneath the glowing eyes of wild creatures, the high-pitched tones of jungle birds, and the snorting of sloths. An overnight guide keeps things civilized. Woodland Park Zoo, 5500 Phinney Ave N, 684-4841, 6:45 pm-8:30 am, $35 (includes breakfast).
HIROSHIMA TO HOPE LANTERN FLOAT -- The time-honored tradition of setting lanterns aflamesoat commemorates victims of the atomic bombings of Hiroshima and Nagasaki. Several Seattle peace organizations come together to sponsor this event, which this year is devoted to youth involvement. South of Bathhouse Theater, NW shore of Greenlake, 527-8050, 6-9:30 pm, free.
LAKE CITY PIONEER DAYS -- Lake City Way lights up for this 57th annual old-fashioned street festival, with a salmon bake, antique car show, library book sale, arts & crafts, pony rides, and a children's parade. Lake City, Lake City Way NE & Northeast 125th St, 363-3287, all day, free.