Oops, it doesn't look like 'assembly on same day' is a national day..

Other days

emoji

Emoji Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
artists

Artists Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
believe

Believe Day
polyamory

Polyamory Day
hiv awareness

Hiv Awareness Day
ponytail

Ponytail Day
chocolate milkshake

Chocolate Milkshake Day
prescription drug take back

Prescription Drug Take Back Day