Pay It Forward Day is a worldwide celebration of kindness that takes place every year on April 28th. Not associated with any organization or foundation and free to participate in, Pay It Forward Day exists to encourage people to stand for kindness out of the goodness of their hearts! Our mission is to inspire acts of kindness on this day in hopes that the ripple of good will continue throughout the entire year.

Source: https://payitforwardday.com/about/about-the-day/