"It takes one letter to say I and four letters to say love and three letters to say you. One hundred and forty-three."

That quote from Fred Rogers has become a symbol of the children's entertainer's legacy. The number 143, his special code for "I love you," is used by a charity inspired by Rogers, and it was spotlighted in the recent documentary movie Won't You Be My Neighbor? Now, Mister Rogers's favorite number has its own holiday in Pennsylvania.

As Philly Voice reports, Pennsylvania governor Tom Wolf declared May 23 to be 143 Day in the state. Rogers was born in Westmoreland County near Pittsburgh and he spent his whole life in the area. By honoring the famous Pennsylvanian with his own holiday, the organizers behind the statewide 143 Day campaign hope to inspire residents to be kind to their neighbors on May 23 and every day of the year.

The initiative encourages schools, businesses, and citizens to share their acts of kindness on social media with the hashtag #143DayinPA. A "kindness tracker" on the campaign's website keeps how many time the hashtag has been used, and so far, over a 6000 acts of kindness have been shared online. And if someone has trouble thinking of ways to honor the spirit of Mister Rogers, the campaign's "kindness generator" can come up with a suggestion for them.

One hundred and forty-three was more than just a fun saying for Fred Rogers: It was a lucky number he made part of his lifestyle. The television personality even went so far as to go swimming every day to maintain his weight at the number.

[h/t Philly Voice]