noun, noun which may take the genitive case particle 'no'
national holiday; public holiday
Refers to a day designated by law as a holiday, such as New Year's Day or Culture Day. Often used with の to modify nouns (e.g., 祝日の予定).
明日は祝日なので、学校は休みです。
Tomorrow is a public holiday, so school is closed.
祝日
I haven't decided my plans for the holiday yet.