The city of Boston’s coordinated spring clean-up will stretch out over three weekends this year— with Dorchester and Mattapan’s “Boston Shines” weekend set for May 2-3. The citywide effort, now in its 12th year, engages thousands of volunteers in targeted cleaning projects.

“Boston belongs to all of us, and I’m encouraging residents in all our neighborhoods to come out and volunteer to ‘Scrub the Hub’ and help make Boston even more beautiful,” Mayor Walsh said in a statement.

This year’s effort will include four service areas: physical service, university engagement, youth development, and creating opportunities to help unite neighbors and communities. The Mayor's Office of Neighborhood Services will coordinate efforts and brooms, shovels, and other tools will be provided distributed.

The first weekend (April 25-26) will focus on West Roxbury, Jamaica Plain, Roxbury, Allston and Brighton. The second weekend, May 2 and 3, will take place in Hyde Park, Roslindale, Dorchester and Mattapan. The final weekend, May 9 and 10, will finish up in Back Bay, Beacon Hill, Mission Hill, Fenway, South End, Bay Village, North End, West End, Downtown, Charlestown, Chinatown, East Boston and South Boston.

Go to the city’s website to sign up as a volunteer or call Neighborhood Services at 617-635-3485.