This Friday at noon the Square features its fourth annual Fish Toss. Come watch in amusement as teams of four attempt to toss a fish from teammate to teammate down a 50-foot course in only 60 seconds. In addition to providing the flying fish, McCormick and Schmick's will be on the square providing some lunchtime treats for purchase.  

Spring is here and that means it's time for the area's first major summer festival, the 31st annual MainStrasse Village Maifest. Based on the German tradition of welcoming the first spring wines, Maifest offers arts and crafts, rides, German and internationally inspired food and beverages, and live entertainment from bands like DV8, 4th Day Echo and Ricky Nye & the Paris Blues Band. Friday-Sunday.  

The Cincinnati Art Museum's current exhibit, 'Starburst: Color Photography in America 1970-1980,' is coming to a close. In honor of its departure, CAM is hosting Click*, a young professionals party, from 8-11 p.m. Friday to celebrate the amazing works. The party will showcase the photographs and feature live music, entertainment, food and drink.  

The 15th International Butterfly Show at the Krohn Conservatory is titled (and also features) the magnificent “Butterflies of Japan.” While wandering through Krohn’s beautiful Japanese-inspired garden, view many exotic plants and flowers, including a Sakura display about Japan’s rich traditions in regards to cherry blossom trees. The floral exhibit will change three times.  

Monroe Mechanical and HOUSH, two companies providing energy-efficient systems since 1954, have opened GreenSource Cincinnati with a mission to inspire the Midwest building community with energy-efficient, sustainable technologies.  

A new facility for the Williams College of Business and a state-of-the-art Conaton Learning Commons are being built with green construction features, providing Xavier students, faculty members, staff, alumni and business executives with 170,000 square feet of additional academic space.  

The largest metaphysical convention in the region, the Victory of Light Expo, is back for its 19th year at the Sharonville Convention Center Saturday and Sunday. The biannual body, mind and spirit expo includes 50 different seminars on topics such as patapsychology, intuitive development and holistic healing as well as 200 vendors offering merchandise including books, music, art, clothing and more.  

The Findlay Market Opening Day Parade consists of a red convertible and truck brigade, floats, local high school bands, local politicians and (of course) CityBeat's annual rolling concert stage featuring a surprise local musical act. Come down to show your support and love for this American tradition by joining in the parade, which starts at 10;30 a.m. at Findlay Market, heads down Race Street, turns on Fifth Street and winds up at Great American Ballpark.  

This weekend, in honor of being named "Beer Capital of the World" in 1880, the Duke Energy Center and many local and worldwide sponsors will hold Cincinnati's very own Beerfest. The three-day long extravaganza offers more than 130 beers from around the world as well as from local home-brewers.  

Celtic Lands Culture Fest features a marketplace with authentic merchandise and goods and a "Celtic Forest" that includes sing-a-long songs, stories and many more family-friendly activities. There will also be a Celtic-themed mural activity, Celtic music and dancing by Celtic groups such as the McGing Irish Dancers. Saturday and Sunday at the Cincinnati Museum Center at Union Terminal.