asita ha yasumi dakedo, hayaokisimasu.

は marks 明日 as the topic: as for tomorrow.

So 明日は means something like speaking of tomorrow or tomorrow, as for that.... The sentence is setting up tomorrow as the time frame and then saying two things about it:

• 休み
• 早起きします

If you used が instead, it would sound like tomorrow itself is being singled out or emphasized more strongly, which is not the basic feel here.

Here, 休み is basically a noun meaning a day off / a holiday / rest.

So 明日は休み is literally closer to:

• Tomorrow is a day off

Japanese often lets nouns work like this in simple statements.

You may expect 明日は休みです, and that is also correct. In this sentence, the です is omitted before だけど, which is very common in casual or semi-casual speech:

• 明日は休みだけど、早起きします。
• 明日は休みですけど、早起きします。 ← more explicitly polite

Both are natural.

Because だけど is connecting the two parts, and in everyday Japanese people often attach it directly after a noun or adjective phrase.

So:

• 休みだけど = it’s a day off, but...

A more fully polite version would be:

• 休みですけど
• 休みですが

Omitting です here does not make the sentence wrong. It just sounds a bit more conversational.

だけど means but, though, or even though.

It connects:

• 明日は休み = Tomorrow is a day off
• 早起きします = I will get up early

So the idea is:

• Tomorrow is my day off, but I’ll get up early.

The contrast is important: being off usually suggests sleeping in, so だけど shows that the second part goes against that expectation.

Yes, だけど is somewhat more conversational than ですが, but mixing it with します is very common in real Japanese.

So this sentence has a mixed but natural level:

• 早起きします = polite
• だけど = conversational connector

This happens a lot in speech.

If you want a more consistently formal/polite version, you could say:

• 明日は休みですが、早起きします。
• 明日は休みですけど、早起きします。

If you want it more casual overall:

• 明日は休みだけど、早起きする。

起きます means to get up / wake up.

But 早起きします specifically means to get up early.

Here, 早起き is a noun meaning early rising / getting up early, and adding します turns it into a verb-like expression:

• 早起きする = to get up early

This is a very common pattern in Japanese:

• 勉強する = study
• 掃除する = clean
• 早起きする = get up early

So 早起きします is more specific than just 起きます.

Because Japanese uses the non-past form for both:

• present actions
• future actions

So 早起きします can mean:

• I get up early
• I will get up early

The time word 明日 already tells you this is about the future, so there is no need for a separate future tense form.

That is completely normal in Japanese.

The subject is omitted because Japanese often leaves out information that is obvious from context.

In a sentence like this, the listener would normally understand that the speaker means:

• I’ll get up early

So the full idea could be:

• 私は明日は休みだけど、早起きします。

But 私は is usually unnecessary unless you want emphasis or contrast.

Japanese very often drops subjects when they are understood.

Yes. That is a very natural way to understand it.

だけど often corresponds to:

• but
• though
• even though

The exact English wording depends on style, but the contrast is the same.

So these are all close in meaning:

• Tomorrow is a day off, but I’ll get up early.
• Even though I’m off tomorrow, I’ll get up early.
• Tomorrow is my day off, but I’m getting up early.

Yes, basically the same meaning.

The difference is mostly tone:

• だけど = more conversational
• ですが = more formal / polished
• ですけど = polite and common in speech

So you could think of them like this:

• 明日は休みだけど、早起きします。
  natural, conversational
• 明日は休みですけど、早起きします。
  polite, common
• 明日は休みですが、早起きします。
  more formal

No. Normal Japanese writing usually does not use spaces between words.

So it would normally be written as:

• 明日は休みだけど、早起きします。

Spaces are often added in learning materials to make the parts easier to see:

• 明日
• は
• 休み
• だけど
• 早起きします

That is helpful for beginners, but it is not standard Japanese spelling.