■ Volunteers plant 3,000 American flags in honor of those lost on 9/11.
5:30-7 a.m., Boston Public Garden.
■ The Red Cross, the Boston Red Sox , and Beth Israel Deaconess Medical Center, along with community leaders, sponsors, and families of victims will host a Day of Remembrance Blood Drive.
7 a.m. to 5 p.m., Fenway Park, Gate D.
■ Wreath-laying ceremony at the Contemplative Garden Memorial
7:30 a.m., Boston Public Garden, Arlington Street entrance side.
■ Flag lowering and national anthem with Governor Deval Patrick presiding.
8:30 a.m., Massachusetts State House lawn, Beacon Street.
■ Volunteers will prepare 2,060 library books for use at Boston Public Schools libraries. (10 books honoring each of the 206 Massachusetts 9/11 victims.)
10 a.m., Boston City Hall, City Hall Square.
■ Volunteers complete projects such as painting murals, working in the gardens, and preparing libraries.
10 a.m., Mather Elementary School (Dorchester,) the Community Academy of Science and Health (Dorchester), and the Hennigan School (Jamaica Plain).
■ Volunteers will support Massachusetts Military Heroes Fund activities, including assembling more than 1,000 care packages for active duty personnel, and writing letters to be included in the package.
11 a.m. to 2 p.m., Rose Fitzgerald Kennedy Greenway.
■ A Tribute to America, the heroes and fallen of 9/11, and American service members. Gates open at noon and the program of music, readings, poetry, and prayer, including music by the Boston Pops Brass Ensemble and Boston Children’s Chorus, is from 3 to 5 p.m. Liz Walker will host the event and Governor Deval Patrick is scheduled to speak. The event features nearly 200 Beyond the 11th bike riders cycling in to mark the end of their 270-mile ride from ground zero and an American flag mural created by Massachusetts schoolchildren.
Noon to 5 p.m., Hatch Shell on the Esplanade.
■ Gathering at the Massachusetts Fallen Firefighter Memorial to remember those who lost their lives on 9/11 and to honor Massachusetts firefighters and their families.
2 p.m., Ashburton Park at the State House.
■ More than 100 members of the Berklee College of Music community share original songs, compositions, poetry, dance, and stories in a multimedia event. Tickets are $8 in advance and $12 the night of the show at the Berklee Performance Center box office or online at berkleebpc.com. For information call 617-747-2261.
7:30 p.m., Berklee Performance Center, 136 Massachusetts Ave.
7:30 p.m., Boston Common Parkman Bandstand.
■ A concert to remember Paige Farley Hackel and all those lost on 9/11, featuring James Montgomery and other performers from Boston’s music scene.
8 p.m., 400 Soldiers Field Road.
■ “Roots of Remembrance,’’ a tree planting project to help reforest communities hit by the June 1 tornado and honor the memories of the victims of 9/11.
7 a.m. to 5 p.m., at various properties in Brimfield, Charlton, Monson, Southbridge, Sturbridge, Wilbraham.
■ Breakfast ceremony/memorial service to remember Holliston 9/11 victims.
7:30 a.m., VFW Hall, 310 Woodland St., Holliston
■ Remembrance ceremony and vigil, including remarks, a reading of the names on the memorial, prayers, and a presentation of colors by the Framingham Fire and Police Department Color and Honor Guards.
8 to 11 a.m., at the September 11 Living Memorial at Cushing Memorial Park, Dudley Road, Framingham.
■ 10th anniversary ceremony.
8 a.m., at 9/11 Memorial Park at Grandview Avenue and Fitz Road, Peabody.
■ Commemoration of 9/11, when Sudbury lost three of its own.
8:15 a.m., Memorial Garden in Heritage Park in the town center, the intersection of Route 27 and Concord Road, Sudbury.
■ Interfaith Service of Peace.
8:30 a.m., Waquoit Congregational Church lawn, 15 Parsons Lane.
■ Parade led by police starts at Constitution Park, at the corner of Foster and Main streets, and ends at the police station on Allens Lane.
8:30 a.m., various locations in Peabody
■ Day of Remembrance Vigil.
8:45 a.m. to 5 p.m., Peace Abbey, Sherborn.
■ Dedication ceremony for NYC firefighter Manny DelValle, who grew up in Brookline.
9 a.m., Babcock Street Fire Station, Brookline.
■ Service followed by procession to St. Mary’s for the 11 a.m. service with the Faure Requiem (in place of the usual 10 o’clock service).
9:45 a.m., Barnstable Fire station at 3245 Main St.
■ Memorial Ceremony.
9:58 a.m., Walker Building, 255 Main St., Marlborough.
■ First responders will run in the second annual “Fall Street Five-K.’’
9:59 a.m., 90 Washington St., Reading.
■ The Peabody police station will be open to the public for guided tours. At 10:30 a.m. a State Police helicopter lands, at noon a Black Hawk helicopter lands. For younger children, the police host a child identification program and feature face painting.
10 a.m., Peabody police station.
■ Firefighters assemble at each of New Bedford’s fire stations. At 10:05 a.m., the collapse of the South Tower announced over the fire department’s radio followed by a moment of silence and remarks by New Bedford’s fire chaplain, the Rev. Robert Oliveira.
10 a.m., various sites in New Bedford.
■ Congregation Agudath Achim and St. Thomas Church come together to commemorate 9/11.
10 a.m. to noon, St. Thomas Episcopal Church, 111 High St., Taunton.
■ Memorial ceremony.
11 a.m., American Legion Post 188, 20 Main St., Sandwich.
■ Prayer service.
11:30 a.m., St. Paul’s Episcopal and Grace United Methodist churches in Hopkinton, 61 Wood St.
■ Remembrance ceremony.
Noon, at Milford Senior Center, 60 North Bow St., Milford.
■ The city of New Bedford will take part in a National Moment of Remembrance. Governments and businesses, houses of worship and railways, fire and police departments ring bells and sound sirens.
1 p.m., New Bedford
■ Newest exhibit at the Fruitlands Museum “Witness to Global Conflict: 9/11 and Beyond.’’
1 to 3 p.m., Fruitlands Museum, Harvard
■ Mass Remembers: Voices of Hope. A choral commemoration in remembrance of 9/11. Student transportation leaves Wasylean Hall at 1:30 p.m. and 2 p.m.
2 p.m., Institute Park, Salisbury Park, Worcester.
■ 10th anniversary ceremony.
2 p.m., John Shea Court, 21 Hodges Ave., Taunton.
■ Reception with artist Leslie Aisner who completed more than 3,000 portraits of missing persons after 9/11.
3 to 5 p.m., Zume’s Coffee House, Charlestown.
■ Observance of 9/11 by a moment of silence.
3:30 p.m., Bird Park, East Walpole.
■ Steven Karidoyanes conducts the Plymouth Philharmonic Cabaret Orchestra in The Esther and Alcide Ruffini Community Concert: “Celebrating the American Spirit.’’
4:30 p.m., Plymouth Public Library, 132 South St.
■ Interfaith remembrance. ICB Wayland and Wayland Clergy Association sponsor commemoration of 9/11 with an afternoon of reflections and prayer. All are invited.
4:30 to 6:30 p.m., Islamic Center of Boston, 126 Boston Post Road, Wayland.
■ Free tribute event honoring the victims of 9/11, their families, and service members and featuring reflections and performances by local artists.
5 to 6 p.m., Zeiterion Theatre, New Bedford.
■ Afternoon of storytelling, music, and dance to honor victims of 9/11.
2 to 5 p.m., Irish American Club, Malden.
■ Candlelight vigil and documentary “9/11.’’ Vigil starts at Wasylean Hall Patio and ends at Robin Kaplan Memorial park. Refreshments and a screening of “9/11’’ will follow in Ghosh Science Center.
6:30 p.m., Wasylean Hall Patio & Ghosh Science Center at Worcester State University.
■ Franklin Interfaith Council, fire, and police departments hold candlelight service.
6:30 p.m., Franklin Town Common.
■ Observance of 9/11. 8:40 a.m., Walpole Town Hall.