Vzhledem k tomu, že lhůta skončí zítra, prověřte položku dnes.

Yes, it is very commonly used as a set phrase. It means something like given that, considering that, or in view of the fact that.

It is built from:

• vzhledem k = with regard to / in view of
• tomu = that (literally to that, in the dative)
• že = that introducing a clause

So the whole expression literally feels like: with regard to the fact that...

In natural English, you usually translate the whole thing as one unit:

• Vzhledem k tomu, že lhůta skončí zítra...
• Given that the deadline ends tomorrow...

Because vzhledem k requires the dative case.

The preposition k generally takes the dative, so:

• to = nominative/accusative form
• tomu = dative form

That is why Czech says:

• vzhledem k tomu, že...

and not:

• vzhledem k to, že... ❌

So this is partly a fixed phrase, but it also follows normal Czech case rules.

Lhůta means deadline, time limit, or period allowed for something.

It is a feminine noun, which you can see from the ending -a and from agreement patterns in other contexts.

Here it is in the nominative singular because it is the subject of skončí:

• lhůta skončí = the deadline will end / expires

A learner may also meet forms like:

• bez lhůty
• do lhůty
• lhůtu

In your sentence, though, the basic dictionary form lhůta is being used.

This is mainly about aspect.

• skončit = perfective = to finish / to come to an end
• končit = imperfective = to be ending / to end repeatedly / to be in the process of ending

In Czech, a perfective present form often has future meaning. So:

• lhůta skončí zítra = the deadline will end tomorrow / expires tomorrow

Even though skončí looks like a present-tense form, it refers to a future completed event because skončit is perfective.

By contrast:

• lhůta končí zítra is also possible in many contexts and often means the deadline is ending tomorrow / expires tomorrow
• but skončí gives a clearer sense of the event being completed

Prověřte is the imperative form of prověřit.

It can be used for:

• you all, check/verify
• or formal singular you, like Please check/verify

So in context it means:

• check it today
• verify the item today
• please review the item today

Because Czech uses the same plural/formal imperative form here, the sentence could be addressed either to:

• several people, or
• one person formally

Because položku is in the accusative singular, which is the case used for the direct object of the verb prověřte.

• položka = nominative singular = dictionary form
• položku = accusative singular

So:

• prověřte položku = check the item

This is very normal for feminine nouns ending in -a:

• nominative: položka
• accusative: položku

Položka is a flexible word. Depending on context, it can mean:

• item
• entry
• line item
• record
• listing

In this sentence, without more context, item is a safe general translation. In a business, accounting, database, or checklist context, it might refer to a specific entry or record that needs checking.

Because the first part of the sentence is a subordinate clause introduced by že, and it comes before the main clause.

Structure:

• Vzhledem k tomu, že lhůta skončí zítra, = subordinate clause
• prověřte položku dnes. = main clause

Czech normally separates such clauses with a comma.

If the order were reversed, you would still use a comma:

• Prověřte položku dnes, vzhledem k tomu, že lhůta skončí zítra.

Yes, Czech word order is fairly flexible, but the given order is natural and clear.

Current structure:

• reason first: Given that the deadline ends tomorrow,
• instruction second: check the item today.

That order makes good sense because the reason leads naturally into the command.

You could rearrange parts for emphasis, for example:

• Prověřte položku dnes, vzhledem k tomu, že lhůta skončí zítra.
• Položku prověřte dnes, vzhledem k tomu, že lhůta skončí zítra.

These alternatives are possible, but they may sound more marked or emphasize a different part of the message.

It is not grammatically necessary, but it is communicatively useful.

The sentence contrasts:

• zítra = the deadline ends tomorrow
• dnes = therefore do the checking today

So dnes adds urgency and makes the timing explicit. Without it:

• Vzhledem k tomu, že lhůta skončí zítra, prověřte položku.

This still works, but it is less specific. Dnes makes the intended action time very clear.

No. It is a good choice, but other verbs could also appear depending on nuance.

For example:

• prověřit = check thoroughly, verify, examine
• ověřit = verify, confirm
• zkontrolovat = check, inspect, review

So:

• prověřte položku dnes suggests a somewhat careful or formal checking
• zkontrolujte položku dnes would also be very natural
• ověřte položku dnes might sound more like confirming correctness or validity

The best choice depends on what kind of checking is meant.

Yes, it sounds fairly formal or professional.

Reasons:

• Vzhledem k tomu, že is more formal than simpler alternatives like protože
• lhůta is a formal/business-like word
• prověřte also sounds more official than a very everyday verb in some contexts

In casual speech, someone might say something simpler, such as:

• Protože termín končí zítra, zkontrolujte to dnes.

But your original sentence is perfectly natural in office, administrative, legal, or procedural contexts.