City remembers victims, survivors and pays it forward on #OneBostonDay

Three years ago today, tragedy struck the city of Boston when twin bombings killed three people and wounded more than 260 at the Boston Marathon.

Today, the city is remembering the victims and survivors by paying it forward on April 15, which was a day of tragedy, and is now One Boston Day.

One Boston Day was first celebrated on April 15th, 2015, and centers around helping those in need and partaking in "random acts of kindness." Across the city many organizations and companies pledged to host blood drives, walks for hunger, and offer free admittance to museums.

On social media, people used the hashtag #OneBostonDay to remember the victims and survivors.

"From community service to blood drives, on #OneBostonDay we show the world what defines us: our people," Massachusetts Governor Charlie Baker tweeted.

Many tweeted photos and shared what they planned to do to mark the day.

Several museums tweeted that people could visit for free in honor of #OneBostonDay.

That's #BostonStrong for you.

Follow @MaryBowerman on Twitter.