Oops, it doesn't look like 'song on auspicious occasion of day' is a national day..

Other days

me

Me Day
unicorn

Unicorn Day
ormille

Ormille Day
hannah

Hannah Day
kale

Kale Day
azonto is acceptable

Azonto Is Acceptable Day
stress awareness

Stress Awareness Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
chocolate milkshake

Chocolate Milkshake Day
polyamory

Polyamory Day