Breakdown of shukujitsu dakara, shinseki ga sofu no ie ni atsumarimasu.
Questions & Answers about shukujitsu dakara, shinseki ga sofu no ie ni atsumarimasu.
祝日 is a noun, and だから is a common way to say because it is ... after a noun.
So:
- 祝日だから = because it is a holiday
You can think of it as coming from:
- 祝日だ = it is a holiday
- 祝日だから = because it is a holiday
This is very natural Japanese.
With nouns, the plain-style pattern is:
- noun + だから
So you do not say 祝日だだから.
The だ is basically built into だから in this pattern.
Compare:
- plain: 祝日だから
- polite: 祝日ですから
- also common/polite: 祝日なので
So 祝日だから is correct, and 祝日ですから would also be correct if you want a more fully polite style.
