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

Other days

camera

Camera Day

pumpkin

Pumpkin Day

healing

Healing Day

blanket fort

Blanket Fort Day

bounce

Bounce Day

pick me

Pick Me Day

gum

Gum Day

boy friend

Boy Friend Day

bonang

Bonang Day

eat what you want

Eat What You Want Day