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

Other days

bow tie

Bow Tie Day
hannah

Hannah Day
tulip

Tulip Day
self appreciation

Self Appreciation Day
lisp

Lisp Day
azonto is acceptable

Azonto Is Acceptable Day
youth

Youth Day
believe

Believe Day
singles

Singles Day
aloxolt

Aloxolt Day