Oops, it doesn't look like 'bestfff day' is a national day..

Other days

ask out your crush

Ask Out Your Crush Day
china

China Day
gum

Gum Day
tulip

Tulip Day
pick me

Pick Me Day
martini

Martini Day
youth

Youth Day
artists

Artists Day
tell a fairytale

Tell A Fairytale Day
healing

Healing Day