Oops, it doesn't look like 'give a dem a tissue day' is a national day..

Other days

kiss a ginger

Kiss A Ginger Day
ponytail

Ponytail Day
boy friend

Boy Friend Day
gum

Gum Day
singles

Singles Day
hot chocolate

Hot Chocolate Day
slime

Slime Day
kale

Kale Day
youth

Youth Day
law

Law Day