Oops, it doesn't look like 'mighty eighth museum air force museum on memorial day' is a national day..

Other days

ruby

Ruby Day

healing

Healing Day

ride the wind

Ride The Wind Day

hoodie

Hoodie Day

ask out your crush

Ask Out Your Crush Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

bow tie

Bow Tie Day

camera

Camera Day

Emoji Day

chocolate milkshake

Chocolate Milkshake Day