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

Other days

coffee

Coffee Day
prosecco

Prosecco Day
carpenters

Carpenters Day
ponytail

Ponytail Day
stud

Stud Day
hiv awareness

Hiv Awareness Day
boba

Boba Day
promposal

Promposal Day
boy friend

Boy Friend Day
law

Law Day