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

Other days

lash

Lash Day
carpenters

Carpenters Day
boba

Boba Day
nae nae

Nae Nae Day
special education

Special Education Day
bow tie

Bow Tie Day
bonang

Bonang Day
lumpy rug

Lumpy Rug Day
youth

Youth Day
hoodie

Hoodie Day