A kártyapótlás holnap lesz.

A is the Hungarian definite article, equivalent to English the.

So:

• a kártyapótlás = the card replacement / the replacement of the card

Hungarian has two main definite article forms:

• a before most consonant sounds
• az before vowel sounds

Here the next word is kártyapótlás, which begins with a consonant sound, so a is used.

Kártyapótlás is a noun. It refers to the replacement or reissuing of a card.

It is built from:

• kártya = card
• pótlás = replacement, making up for something missing, reissue

So literally it is something like:

• card-replacement

In natural English, depending on context, it could mean:

• card replacement
• replacement of the card
• reissuing the card

This kind of compact noun is very common in Hungarian.

Because Hungarian very often forms compound nouns by writing them as a single word.

So:

• kártya
  • pótlás → kártyapótlás

English often uses separate words where Hungarian prefers a compound:

• English: card replacement
• Hungarian: kártyapótlás

This is normal and very common in administrative, official, and practical vocabulary.

Holnap is an adverb meaning tomorrow.

In this sentence, it tells you when the event happens:

• A kártyapótlás holnap lesz.
• The card replacement will be tomorrow.

It does not need any extra ending here. It already functions as a time adverb on its own.

Compare:

• ma = today
• holnap = tomorrow
• tegnap = yesterday

Lesz is the future form of lenni (to be).

• van = is
• lesz = will be

Since the sentence talks about something happening tomorrow, Hungarian uses lesz:

• A kártyapótlás holnap lesz.
• The card replacement will be tomorrow.

Using van here would sound wrong, because van refers to the present, while holnap clearly points to the future.

Yes, in this sentence the future is shown by lesz, the future form of to be.

A useful thing to know is that Hungarian often expresses future time in more than one way:

1. Present tense + future time word

   • Holnap megyek.
   • I’m going tomorrow.

2. Future auxiliary-like form with certain verbs

   • fog
     • infinitive
   • Holnap menni fogok.
   • I will go tomorrow.

3. With to be, the future form is lesz

   • Holnap lesz.
   • It will be tomorrow.

So in this sentence, lesz is the natural choice.

Hungarian word order is flexible, but it is not random. It often depends on topic and focus.

In this sentence:

• A kártyapótlás is the topic: what we are talking about
• holnap lesz tells us the key information about it

So the sentence feels like:

• As for the card replacement, it will be tomorrow.

This is a very natural neutral word order.

Another common version is:

• Holnap lesz a kártyapótlás.

That puts more emphasis on holnap (tomorrow), as if answering When will the card replacement be?

So both are possible, but they sound slightly different in emphasis.

Yes, absolutely.

Both are correct:

• A kártyapótlás holnap lesz.
• Holnap lesz a kártyapótlás.

The difference is mainly emphasis:

• A kártyapótlás holnap lesz.
  = talking about the card replacement, then saying when it is

• Holnap lesz a kártyapótlás.
  = emphasizing tomorrow

This is very common in Hungarian: changing word order often changes what is highlighted.

Because Hungarian does not always need a separate word corresponding to English will.

In this sentence, future meaning is built into lesz itself:

• van = is
• lesz = will be

So English uses two words:

• will be

Hungarian uses one word:

• lesz

With other verbs, Hungarian may use:

• present tense with a future time word, or
• fog
  • infinitive

But with lenni (to be), lesz is the normal future form.

Yes. Pótlás is a noun made from a verb idea, similar to English nouns like replacement, renewal, or completion.

The ending -ás / -és often creates nouns of action or process in Hungarian.

For example:

• tanul = study

• tanulás = studying, study

• pótol = replace, make up for
• pótlás = replacement

So kártyapótlás is literally a noun meaning something like card replacement.

Word-for-word, it is roughly:

• The card replacement tomorrow will-be.

But natural English would usually be:

• The card replacement will be tomorrow.
• The card will be replaced tomorrow.
• The replacement of the card is tomorrow.
  depending on context

Hungarian often uses compact noun phrases like kártyapótlás, where English may prefer a fuller phrase or even a verb.

A rough pronunciation is:

• kaar-tya-poh-tlaash

A few helpful notes:

• á is a long vowel, roughly like a in father, but longer
• ty is a soft consonant, somewhat like the t in British English tune for some speakers, though not exactly
• ó is a long o
• s in Hungarian sounds like English sh
  • so pótlás ends with -laash, not -lass

So kártyapótlás does not end with an English s sound; it ends with a sh sound.

In this sentence, yes, if you mean a specific, identifiable event: the card replacement.

• A kártyapótlás holnap lesz.
  = The card replacement will be tomorrow.

If you removed a, the sentence would sound incomplete or unnatural in standard usage, because kártyapótlás here refers to a specific scheduled thing.

Hungarian uses articles somewhat differently from English, but in a sentence like this, the definite article is the normal choice.