BOSTON (WHDH) - The public is encouraged to spread kindness Friday on One Boston Day as the city marks the 9th anniversary of the Marathon bombing.

Governor Charlie Baker and Boston Mayor Michelle Wu paid silent tribute to the victims of the Boston Marathon bombings: Lingzi Lu, Krystle Campbell, Martin Richard, Sean Collier, and Dennis Simmonds.

They stood at a wreath laid at the site of the first explosion before walking down Boylston Street to another wreath at the site of the second blast near the finish line.

After a moment of silence, bells chimed at the Old South Church in memory of those who were lost that day.

Governor Baker spoke with Krystal Campbell’s brother and walked down Boylston Street with the Richard family, marveling at their strength.

“The families have done, what I would describe as, an extraordinary job of trying to find a way to create some positivity in all this,” he said.

Each year since the tradition started on April 15, 2015, the day has served as an opportunity to celebrate the resiliency, generosity, and strength demonstrated by the people of Boston and those around the world in response to the tragedy of April 15, 2013.

Mayor Wu asked residents to share their acts of kindness in honor of those who died in the events around the bombing.

“One Boston Day is our opportunity to stand together in service to and in solidarity with others, showcasing what makes Boston so special,” Wu said. “Whether it’s thanking our frontline workers or leaving a friendly, encouraging note on the T for a fellow rider, we could all benefit from a little kindness.”

Wu took part in a cleanup event at the Carter School on Friday morning, where she worked in the sensory garden.

“The combination of the marathon, the Boston Marathon being back on Patriots’ Day means that we will have a chance once again to demonstrate to the entire world what makes Boston so incredible,” she said.

For ways to participate, download a checklist and share your acts of kindness with the world using the hashtag #onebostonday.

The 126th running of the Boston Marathon will be held on Patriots Day on Monday.

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