yasumi no hi ha, asagohan wo tabenakattari, hirune wo sitari simasu.

休みの日 means a day off or a day when you are not working/school is off.

• 休み = rest, a break, a holiday, a day off
• 日 = day
• の links the nouns, so literally it is something like day of rest / off day

So 休みの日は means as for days off... or on my days off...

の is the particle that connects nouns.

Here, 休み modifies 日:

• 休みの日 = day of rest / day off

This is very common in Japanese:

• 日本の車 = Japanese car
• 学校の先生 = school teacher
• 雨の日 = rainy day

So の is not possession only; it can show many noun-to-noun relationships, including description.

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.

This pattern means do things like A and B.

It is used to give examples of actions, not a complete list. The speaker is naming some typical things they do on days off.

So:

• 朝ご飯を食べなかったり、昼寝をしたりします means
• I do things like skip breakfast and take naps

Important nuance:

• It does not necessarily mean these are the only things they do.
• It does not necessarily mean they do both every single time.
• It often gives a casual for example feeling.

For the 〜たり pattern, you attach り to the verb’s plain past form.

Examples:

• 食べる → 食べた → 食べたり
• する → した → したり

For a negative example:

• 食べない → 食べなかった → 食べなかったり

So 食べなかったり comes from the plain past negative form 食べなかった plus り.

Even though it looks past, in this grammar pattern it does not automatically mean past time. It is just the form used to build the たり expression.

Because 〜たり〜たりする can freely mix:

• positive actions
• negative actions
• different kinds of behaviors

So:

• 朝ご飯を食べなかったり = sometimes not eating breakfast / skipping breakfast
• 昼寝をしたり = sometimes taking a nap

This is natural Japanese. The speaker is describing the kinds of things they do on days off, and those examples can include both doing something and not doing something.

Because in the pattern 〜たり、〜たりする, the final する is the main verb of the whole sentence.

Think of it like this:

• 食べなかったり and したり are example-action forms
• します finishes the sentence and carries the tense and politeness

So the structure is:

• Aたり、Bたりする
• do things like A and B

In this sentence, the final します makes it polite and non-past.

Not necessarily.

With 〜たり〜たりする, the speaker is usually listing examples, not giving a step-by-step sequence.

So this sentence does not strongly mean:

• First I skip breakfast, then I take a nap

Instead, it means more like:

• On days off, I do things like skip breakfast and take naps

The order of the examples is usually not important.

No. That is one of the key nuances of 〜たり〜たりする.

It suggests examples of typical behavior, not a strict every-time routine.

So the sentence can imply:

• sometimes I skip breakfast
• sometimes I take a nap
• these are the kinds of things I do on days off

It is looser than a direct statement like:

• 朝ご飯を食べなくて、昼寝をします which sounds more like a specific sequence or direct statement.

を marks the direct object.

• 朝ご飯を食べる = eat breakfast
• 昼寝をする = take a nap

In 朝ご飯を食べる, 朝ご飯 is the thing being eaten.

In 昼寝をする, 昼寝 is a noun, and Japanese often uses noun + をする to mean do that activity:

• 勉強をする = study
• 運動をする = exercise
• 昼寝をする = take a nap

So both uses of を are normal.

Japanese often does not mark singular vs. plural clearly.

So 休みの日は can be understood as:

• on a day off
• on days off
• when I have a day off

In this sentence, because it describes a habitual kind of behavior, English usually translates it more naturally as on days off or on my days off.

します is polite non-past.

In Japanese, the non-past form can cover:

• present habitual actions
• future actions
• general truths

Here it is being used for a habitual meaning:

• On days off, I do things like skip breakfast and take naps

So it is not talking about one specific past day off. It describes a usual pattern.