Anyone driving down Main Street knows when the city's annual neighborhood block party happens this year: it's prominently displayed on the Mohawk marquee. But if you haven't ventured downtown (and why not?), the date's Wednesday, Aug. 25.

Main, Holden, Eagle and upper Ashland streets will be shut down from 5:30 to 9 on Wednesday evening so more than 45 vendors,  merchants and organizations (nearly half of which are restaurants or food servers) can set up shop along the city's main drags.

Entertainment will be provided throughout the evening on Eagle Street and different locations along Main Street. Visit iBerkshires at 106 Main St. for free popcorn.

North Adams historian Paul W. Marino will lead a historical walk of Main Street at 5. Those interested should meet at the foundry works marker across the street from the Office of Tourism and above Subway Restaurant. At the Berkshire Plaza, the Drury High School band, directed by Christopher Caproni, will perform beginning at 6. At 7, the popular Berkshire County Line Dancers will take the stage in front of the plaza.

In front of Greylock Federal Credit Union at 66 Main St., Karen's School of Dance will perform at 6 followed by a show presented by the Berkshire Dance Theater at 6:15. Next to TD Bank and iBerkshires, Otha Day will perform with approximately 30 drummers at 7. Also at 7, Traci Kittler and Champagne Jam, sponsored by the North Adams Transcript, will play at 85 Main St. Miss Guided will also play at 7 at the corner of Holden and Main streets.

The duo Whirlwind will play near 15 Eagle St., beginning at 6. The popular Loose Change, sponsored by Adams Cooperative Bank, will perform in front of 31 Eagle St. beginning at 7.

One of the more interesting attractions of the night will be the Holden Street Art, or "Holden StArt." Volunteers led by Boston sidewalk artist Sidewalk Sam will use 1,000 square feet of pavement as a canvas for a chalk painting. The event is a preliminary effort to a larger public art project being developed by Art About Town for the Massachusetts Museum of Contemporary Art's excess parking lot behind the Big Y.

To volunteer or for any other questions about the installation, call 413-664-0197.

 The public is also invited to tour DownStreet Art galleries, which will be gearing up for the Aug. 26 "Last Thursday" gallery openings. Other evening attractions include a first-ever Downtown Celebration dunk tank, provided by Drury band boosters, at 48 Main St. near American Legion Drive and displays and sales from downtown merchants.

The celebration was originated in 1996 as a way to celebrate downtown beautification efforts and became an annual event. Rain date for the celebration is the next night, Thursday, Aug. 26. For more information on the celebration or the Holden Street Art project, contact the Office of Tourism at 413-664-6180 or northadamstourist1@yahoo.com.