Oops, it doesn't look like 'universe galaxy milky way girlfriend day' is a national day..

Other days

prosecco

Prosecco Day

girl friend

Girl Friend Day

ask out your crush

Ask Out Your Crush Day

book

Book Day

stress awareness

Stress Awareness Day

ruby

Ruby Day

bow tie

Bow Tie Day

Me Day

one

One Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day