Oops, it doesn't look like 'flag is not at half mast day' is a national day..

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
lost sock memorial

Lost Sock Memorial Day
promposal

Promposal Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
emoji

Emoji Day
pick me

Pick Me Day
hoodie

Hoodie Day
self appreciation

Self Appreciation Day
self care

Self Care Day
ride the wind

Ride The Wind Day