NEW YORK — Democratic presidential nominee Hillary Clinton and her running mate, Tim Kaine, will not campaign or run ads on Sept. 11.

A campaign official has confirmed that Clinton will refrain from stumping on the 15th anniversary of the terror attacks that killed nearly 3,000 people.

A national nonprofit named 9/11 Day sent letters this week to presidential candidates, asking them to stop their public political activities that day. It wants to instead focus on service and remembrance.

In addition, 9/11 Day is urging people running for Congress to refrain from campaigning.

In 2012, the organization made a similar request; both Mitt Romney and Barack Obama complied.

“We would like to rekindle that spirit of unity and togetherness that marked the mood after the attacks,” said David Paine, the nonprofit’s president and co-founder. “Instead, we now have a more intense degree of divisive rhetoric.”

A spokeswoman for Republican presidential nominee Donald Trump didn’t immediately respond to a request for comment Thursday.

The organization encourages everyone to dedicate their time on Sept. 11 to helping others, whether privately or as part of organized charity and service.