Oops, it doesn't look like 'grape popsicle buttercup day' is a national day..

Other days

ruby

Ruby Day
lost sock memorial

Lost Sock Memorial Day
ponytail

Ponytail Day
brow

Brow Day
me

Me Day
emoji

Emoji Day
lash

Lash Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
azonto is acceptable

Azonto Is Acceptable Day
martini

Martini Day