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

Other days

cursing

Cursing Day
frozen yogurt

Frozen Yogurt Day
ormille

Ormille Day
bow tie

Bow Tie Day
pampering

Pampering Day
martini

Martini Day
stud

Stud Day
blanket fort

Blanket Fort Day
boba

Boba Day
hot chocolate

Hot Chocolate Day