He suggested that we make it a new holiday. May 14 is Random Acts of Kindness Day. Even if that day already exists, no harm in making another one :).
So, yeah. Try to make a conscious effort to do nice things for people today. Open doors, carry groceries, hand the homeless man a sandwich, do whatever nice thing you have the opportunity to do for someone.
Oh, and post something about it in your journals to encourage others to do the same.