National Smile Day 2024 Activities. Looking for some fun world smile day activities to do with your children? Celebrate national smile day on may 31 this year with your office staff and clients.

On october 4, world smile day ®, we illuminated a record 64 landmarks around the world — from the cn tower in toronto to the bt tower in london, from the puente de la mujer (women’s bridge) in buenos aires to the rizal monument in manila, to everywhere in between — in smile train blue. Since national smile day falls on a friday this year, there are extra reasons to celebrate.