Donderdag lees ik thuis.

Dutch main clauses usually follow the verb-second (V2) rule: the finite verb must be the second element in the sentence.

So if you start with Donderdag, the verb lees must come next:

• Donderdag lees ik thuis.

If you started with Ik, you would say:

• Ik lees donderdag thuis.

Both are correct, but starting with Donderdag gives extra emphasis to Thursday.

This is also because of the V2 rule.

When the sentence begins with something other than the subject, the subject moves after the verb:

• Donderdag lees ik thuis.

Compare:

• Ik lees thuis.
• Donderdag lees ik thuis.

In English, we usually keep I read, but Dutch changes the order more often in main clauses.

Lees is the present tense form of the verb lezen (to read) used with ik.

Dutch present tense often works like this:

• ik lees
• jij leest
• hij/zij leest
• wij lezen
• jullie lezen
• zij lezen

So lees is simply the correct I form of lezen.

In Dutch, days of the week are often used without a preposition when you mean on Thursday in a general time expression.

So Dutch says:

• Donderdag lees ik thuis.

where English would usually say:

• On Thursday, I read at home.

This is very normal in Dutch.

Thuis means at home and functions as an adverb of place.

In a simple Dutch main clause, adverbs like time and place often come after the verb and subject. A very common pattern is:

• Time + verb + subject + place

So:

• Donderdag = time
• lees = verb
• ik = subject
• thuis = place

That makes Donderdag lees ik thuis sound natural.

It is understandable, but it is not the most natural order in normal Dutch.

More natural versions are:

• Ik lees donderdag thuis.
• Donderdag lees ik thuis.

Dutch usually prefers the time expression earlier in the sentence rather than placing donderdag at the very end in a simple sentence like this.

Normally, days of the week are not capitalized in Dutch, so the standard spelling is:

• donderdag lees ik thuis.

However, if the word is at the beginning of the sentence, it gets a capital letter because it is sentence-initial:

• Donderdag lees ik thuis.

So the capital here is because it starts the sentence, not because it is a day name.

Yes. Lees is present tense, but Dutch often uses the present tense for the near future or for planned actions, just like English sometimes does.

So depending on context, this can mean something like:

• On Thursday I read at home
  or
• On Thursday I’m reading at home / I will read at home

The exact time sense usually comes from context.

Yes. That is also correct, and it can sound a bit more clearly future-oriented or emphasize the activity as a plan.

Compare:

• Donderdag lees ik thuis.
• Donderdag ga ik thuis lezen.

Both are fine. The first is simpler and very natural. The second uses gaan + infinitive, similar to going to read.

Huis means house/home as a noun:

• Dat is mijn huis. = That is my house.

Thuis means at home/home as an adverb:

• Ik ben thuis. = I am at home.
• Donderdag lees ik thuis. = On Thursday I read at home.

So in this sentence, thuis is correct because it describes where the action happens.

Usually no comma is needed here.

English often writes:

• On Thursday, I read at home.

In Dutch, the comma is usually omitted in a short sentence like this:

• Donderdag lees ik thuis.

A comma might appear in longer sentences for clarity, but in this simple example, no comma is standard.

You can move thuis to the front. Because of the V2 rule, the verb still stays in second position:

• Thuis lees ik donderdag.

That puts more emphasis on thuis.

However, the most neutral version is still:

• Donderdag lees ik thuis.

Dutch word order is often used to highlight different parts of the sentence.