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

Other days

eat what you want

Eat What You Want Day
coffee

Coffee Day
artists

Artists Day
offer

Offer Day
pampering

Pampering Day
blanket fort

Blanket Fort Day
boba

Boba Day
fiancee

Fiancee Day
ormille

Ormille Day
martini

Martini Day