Ważność wygaśnie jutro.

Ważność is a noun meaning validity or the period during which something is valid.

In practical contexts, it often refers to things like:

• a document’s validity
• a ticket’s validity
• a contract’s validity
• a prescription’s validity

So in a sentence like Ważność wygaśnie jutro, ważność is the thing that will end.

This is a bit formal. In everyday life, Polish speakers often use fuller phrases like:

• termin ważności = expiry date / validity period
• data ważności = valid-until date

For example, on packaging you are more likely to see termin ważności than just ważność by itself.

This is a very common Polish question because it works differently from English.

Wygaśnie comes from the verb wygasnąć, which is a perfective verb. In Polish, perfective verbs do not normally have a true present tense for ordinary use. Their “present-looking” forms actually refer to the future.

So:

• wygasać = imperfective, to be expiring / to expire in a repeated or ongoing sense
• wygasnąć = perfective, to expire / to come to an end as a completed event

That means:

• ważność wygasa = validity is expiring / is in the process of expiring / expires (habitually, depending on context)
• ważność wygaśnie = validity will expire

So even though wygaśnie looks like a present form, it means will expire.

The infinitive is wygasnąć.

A useful pair to learn is:

• wygasać — imperfective
• wygasnąć — perfective

This is one of those Polish aspect pairs where the perfective form is used for a single completed future event.

Examples:

• Umowa wygasa jutro. = The contract expires tomorrow.
  This can sound more factual/scheduled.
• Umowa wygaśnie jutro. = The contract will expire tomorrow.
  This clearly points to the future completion of the event.

In many contexts, both may be possible, but wygaśnie strongly emphasizes the completed future result.

No. Wygasnąć can be used for several things that come to an end or cease to be valid/active.

Common uses include:

• paszport wygaśnie = the passport will expire
• umowa wygaśnie = the contract will expire
• licencja wygaśnie = the license will expire
• gwarancja wygaśnie = the warranty will expire
• mandat wygaśnie = the mandate/term will expire
• pożar wygasł = the fire died out
• emocje wygasły = the emotions faded away

So the verb can be literal or figurative. In your sentence, it is the legal/administrative sense: validity will expire.

Because Polish has no articles.

English distinguishes between:

• a validity
• the validity

Polish does not. The noun ważność can mean validity, the validity, or sometimes something closer to its validity, depending on context.

So Ważność wygaśnie jutro literally looks like:

• validity will-expire tomorrow

But in natural English you would usually say:

• The validity expires tomorrow
• It expires tomorrow
• The validity will expire tomorrow

The exact English version depends on the context already known to the listener.

It is in the nominative case, because it is the subject of the sentence.

You can ask:

• Co wygaśnie jutro? = What will expire tomorrow?

Answer:

• Ważność.

So:

• ważność = nominative singular
• jutro = adverb meaning tomorrow
• wygaśnie = verb

This is a very simple subject–verb–time sentence.

No, Polish word order is fairly flexible.

Ważność wygaśnie jutro is a neutral, natural order. But other orders are possible, depending on emphasis:

• Ważność wygaśnie jutro. = neutral
• Jutro wygaśnie ważność. = emphasizes tomorrow
• Wygaśnie jutro ważność. = possible, but less neutral and more stylistically marked

In everyday speech, the original order is probably the safest choice.

So yes, the sentence can be rearranged, but the version you have is natural and straightforward.

A rough English-friendly guide would be:

• Ważność ≈ VAZH-noshch
• wygaśnie ≈ vih-GASH-nye
• jutro ≈ YOO-tro

A few sound notes:

• w in Polish sounds like English v
• ż sounds like the s in measure
• ś is a soft sh-like sound
• ć / ci would be a soft ch sound, though it does not appear here directly
• j sounds like English y
• y is a vowel that does not exist exactly in English; it is not the same as ee

A more IPA-like approximation:

• [ˈvažnɔɕt͡ɕ vɨˈɡaɕɲɛ ˈjutrɔ]

You do not need perfect pronunciation right away, but it helps to notice how many soft consonants Polish uses here.

Here, jutro is an adverb meaning tomorrow.

It tells you when the action happens:

• wygaśnie kiedy? = will expire when?
• jutro = tomorrow

Polish often uses time expressions very simply, without prepositions:

• dziś = today
• jutro = tomorrow
• wczoraj = yesterday

So jutro does not change form here.

Yes, and in many real-life situations that may sound even more natural.

Compare:

• Ważność wygaśnie jutro. = The validity will expire tomorrow.
• Termin ważności wygaśnie jutro. = The validity period / expiration date will expire tomorrow.

Even more common in labels and official information are phrases like:

• Termin ważności upływa jutro.
• Data ważności to jutro.
• Dokument traci ważność jutro.

A very natural alternative is:

• Dokument straci ważność jutro. = The document will lose validity tomorrow.

So your sentence is correct, but depending on context, Polish might prefer a fuller phrase.

They are close, but not identical in feel.

• wygaśnie = will expire, will lapse, will come to an end
• straci ważność = will lose validity

Both work for legal or administrative validity.

Examples:

• Paszport wygaśnie jutro.
• Paszport straci ważność jutro.

The second version is slightly more explicit because it literally says lose validity. The first is more compact and very common.

So if you understand wygaśnie, you will often also see related expressions built with stracić ważność.

It sounds neutral to slightly formal.

Why?

• ważność is a somewhat official-sounding noun
• wygaśnie is common in administrative, legal, technical, and formal contexts

You might hear it in:

• official notices
• contract language
• websites
• forms
• packaging information

In casual conversation, people might choose something simpler depending on the object:

• Bilet jest ważny tylko do jutra. = The ticket is only valid until tomorrow.
• Paszport kończy się jutro. = The passport expires tomorrow.
  (less formal, though context matters)
• Jutro traci ważność. = It loses validity tomorrow.

So the sentence is perfectly normal, but it has an administrative flavor.

Yes, very often.

If everyone knows what it refers to, Polish may simply say:

• Wygaśnie jutro. = It will expire tomorrow.
• Jutro wygaśnie. = It will expire tomorrow.

Polish often drops things that English would make explicit, as long as the context is clear.

For example, on a webpage about a license, you might see:

• Wygaśnie jutro

and the reader understands that the license, subscription, or validity period is meant.

So the full sentence is useful and clear, but Polish can be more compact when context does the work.