Oops, it doesn't look like 'flag colours to celebrate its day' is a national day..

Other days

bow tie

Bow Tie Day
self care

Self Care Day
healing

Healing Day
boba

Boba Day
lisp

Lisp Day
tulip

Tulip Day
cat girl

Cat Girl Day
ride the wind

Ride The Wind Day
bounce

Bounce Day
kale

Kale Day