A free celebration of San Juan's day, which is the traditional start of the rainy season, takes place from 10 a.m. to 2 p.m., Saturday, June 25. The event includes a rain reading, a monsoon gardening demonstration, a farm tour and a potluck luncheon. Native Seeds/SEARCH seedlings are available for sale. Participants should wear sturdy, closed-toe shoes and bring a dish to share. Call 622-0830, ext. 105, for more information.