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

Other days

pick me

Pick Me Day
bounce

Bounce Day
hannah

Hannah Day
fiancee

Fiancee Day
boba

Boba Day
bow tie

Bow Tie Day
self appreciation

Self Appreciation Day
aloxolt

Aloxolt Day
my little pony

My Little Pony Day
latina equal pay

Latina Equal Pay Day