Breakdown of yasumi no hi wa, asagohan o tabenakattari, hirune o shitari shimasu.
Questions & Answers about yasumi no hi wa, asagohan o tabenakattari, hirune o shitari shimasu.
は marks the topic.
So 休みの日は sets the context as when it comes to days off or on days off. Then the rest of the sentence tells you what happens in that context.
It gives the sentence a feel like:
- As for my days off, I do things like...
This is different from が, which would focus more on the subject itself.
