S obzirom na to da je subota, ujutro mijesim tijesto za kruh.

It means considering that, given that, or since.

In this sentence, S obzirom na to da je subota gives the reason/background for the main action:

• S obzirom na to da je subota = Since it’s Saturday
• ujutro mijesim tijesto za kruh = I knead bread dough in the morning

This whole expression is very common in Croatian and is best learned as one fixed phrase.

Yes, roughly:

• s obzirom = with regard / considering
• na to = on that / to that
• da = that

So literally it is something like with regard to the fact that...

But in real use, you should treat s obzirom na to da as a set phrase, not build the meaning from each word every time.

Because Croatian is literally saying it is Saturday.

• je subota = it is Saturday

Here subota is in the nominative, because it is the predicate noun after je.

Compare:

• Danas je subota. = Today is Saturday.
• U subotu mijesim tijesto. = On Saturday I knead dough.

So:

• je subota describes what day it is
• u subotu means on Saturday

Because S obzirom na to da je subota is a subordinate clause placed before the main clause.

Structure:

• subordinate clause: S obzirom na to da je subota
• main clause: ujutro mijesim tijesto za kruh

Croatian normally separates this kind of introductory clause with a comma.

Ujutro means in the morning.

It is commonly written as one word when it functions as an adverb of time:

• Ujutro pijem kavu. = I drink coffee in the morning.

Learners sometimes expect u jutro, but ujutro is the normal adverbial form here.

Mijesim means I knead.

Its infinitive is mijesiti = to knead.

So:

• mijesiti = to knead
• mijesim = I knead

This is a 1st person singular present tense form.

Because Croatian present tense often covers both:

• I am kneading
• I knead
• I usually knead

In this sentence, the meaning is naturally habitual or regular:

• Since it’s Saturday, I knead bread dough in the morning.

So Croatian uses the present tense here for a routine action.

Tijesto means dough. Here it is in the accusative singular, because it is the direct object of mijesim.

• mijesim što? = what am I kneading?
• tijesto

For this noun, nominative and accusative singular look the same:

• nominative: tijesto
• accusative: tijesto

So the form does not change here.

Za kruh means for bread.

After za, Croatian usually uses the accusative. Since kruh is a masculine inanimate noun, its accusative singular is the same as the nominative:

• nominative: kruh
• accusative: kruh

So:

• tijesto za kruh = dough for bread

This means dough intended to make bread.

Because tijesto za kruh means dough for making bread, while od kruha would mean made from bread.

That would express a different idea.

Compare:

• tijesto za kruh = dough for bread
• mrvice od kruha = breadcrumbs made from bread

So za kruh is the natural choice here.

No. In standard Croatian, kruh is the usual word. But in some regions, especially under Serbian influence or in neighboring varieties, you may also hear hleb / hljeb.

For standard Croatian, use:

• kruh = bread

Yes, Croatian word order is fairly flexible.

The given sentence is natural:

• S obzirom na to da je subota, ujutro mijesim tijesto za kruh.

But other orders are also possible, depending on emphasis:

• Ujutro, s obzirom na to da je subota, mijesim tijesto za kruh.
• Mijesim ujutro tijesto za kruh, s obzirom na to da je subota.

The original version sounds neutral and clear.

It is a little more formal or careful than some other ways of saying since or because, but it is still very normal.

Other possibilities include:

• budući da = since / given that
• pošto = since / after
• jer = because

So you could also say:

• Budući da je subota, ujutro mijesim tijesto za kruh.

But s obzirom na to da is perfectly good Croatian.

By itself, it most naturally sounds like a routine or habit, especially because of:

• je subota = it’s Saturday
• ujutro = in the morning
• present tense mijesim

So the listener will likely understand:

• Since it’s Saturday, I knead bread dough in the morning
• in other words, that’s what I do on Saturday mornings

If you wanted to make it sound more like a one-time action happening right now, you would usually add more context.