Mayor Walsh unveiling the 2014 Boston Marathon banners/ Image via Nick DeLuca

[UPDATE 4/13/2015]: Mayor Marty Walsh today launched the “One Boston Day” website, www.onebostonday.orgdedicated to sharing how Boston and people around the world are marking April 15.  

On April 15, 2015, just five days before the running of this year’s Boston Marathon, the City of Boston will observe the first ever One Boston Day – a new tradition that will highlight the positive efforts put forth by Bostonians and everyone who helped during the aftermath of the tragic Marathon bombings.

News of the announcement came while Mayor Marty Walsh helped unveil the Marathon banners that will line Boylston Street this year.

On Thursday morning, March 19, Mayor Walsh joined the folks over at Boston Herald Radio to discuss, in part, Boston’s bid for the 2024 Summer Olympic Games, the $7,500 per day former governor Deval Patrick is earning as Boston 2024’s global ambassador, and to explain One Boston Day.

“One Boston Day will inspire all of us to come together as the community we are and share the spirit of Boston by giving back,” said Mayor Walsh in a statement. “April 15 is a date that has come to stand for our city’s deepest values. I hope everyone can mark this day in a way that is appropriate and inclusive for each of our experiences.”

Rather than relive the horrors of that fateful April 15, 2013, One Boston Day is a way to commemorate those who put themselves at risk to pull others out of the fray as well as all of the other charitable acts that followed such as the formation of the One Fund and other philanthropic endeavors.

It will also encourage people to continue assisting others in acts of kindness and within their communities.

On the day of April 15, Mayor Walsh will assist in raising the Boylston Street banners to celebrate the lives of the victims and survivors, followed by multiple neighborhood visits throughout the city.