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

Other days

tulip

Tulip Day
ruby

Ruby Day
cuddle up

Cuddle Up Day
hot chocolate

Hot Chocolate Day
ask out your crush

Ask Out Your Crush Day
china

China Day
youth

Youth Day
aloxolt

Aloxolt Day
lisp

Lisp Day
buddy

Buddy Day