Oops, it doesn't look like 'palace were part of a larger day' is a national day..

Other days

blanket fort

Blanket Fort Day
aloxolt

Aloxolt Day
stress awareness

Stress Awareness Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
prescription drug take back

Prescription Drug Take Back Day
offer

Offer Day
hoodie

Hoodie Day
brow

Brow Day
ride the wind

Ride The Wind Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day