Oops, it doesn't look like 'best marks in another strong day' is a national day..

Other days

self care

Self Care Day
ormille

Ormille Day
bow tie

Bow Tie Day
boy friend

Boy Friend Day
kale

Kale Day
blanket fort

Blanket Fort Day
nae nae

Nae Nae Day
boba

Boba Day
eat what you want

Eat What You Want Day
offer

Offer Day