A kezdés holnap nyolckor lesz.

Kezdés is a noun meaning the start / the beginning. So the sentence is built as The start will be tomorrow at eight rather than It starts tomorrow at eight.

Hungarian often expresses ideas this way:

• A kezdés holnap nyolckor lesz. = talking about the start as a thing
• Holnap nyolckor kezdődik. = using a verb, it starts tomorrow at eight

Both are natural, but this sentence specifically chooses the noun kezdés.

A is the definite article, meaning the.

Hungarian uses the definite article when the speaker means a specific, identifiable thing. Here, a kezdés means the start of some known event, class, meeting, show, and so on.

English might sometimes leave this more implicit, but Hungarian often includes the article naturally in cases like this.

Lesz is the future form of van (to be), and here it means will be.

Because the sentence is built around the noun kezdés, Hungarian uses lesz:

• A kezdés ... lesz = The start will be ...

If you used a full verb instead, you would usually not need lesz:

• Holnap nyolckor kezdődik. = It starts tomorrow at eight.

So lesz is there because the structure is noun + will be, not because all future sentences need lesz.

Nyolckor means at eight o’clock.

It is made from:

• nyolc = eight
• -kor = a suffix meaning at (used with clock times)

So:

• hatkor = at six
• hétkor = at seven
• nyolckor = at eight

This is why Hungarian does not need a separate word like at here.

Because Hungarian often uses suffixes where English uses separate prepositions.

In English:

• at eight

In Hungarian:

• nyolckor

The -kor ending already contains the meaning of at for times.

Holnap simply means tomorrow by itself. Hungarian does not need a word like on or in before it.

Compare:

• English: tomorrow
• Hungarian: holnap

So holnap nyolckor is just tomorrow at eight.

This is a natural, neutral word order.

Very roughly, Hungarian is often organized by topic and focus rather than by a fixed English-style order. Here:

• A kezdés = the topic, what the sentence is about
• holnap nyolckor = the time information
• lesz = the verb, placed at the end in this neutral sentence

Hungarian word order is flexible, though. You could also hear:

• Holnap nyolckor lesz a kezdés.

That version puts the time first and sounds more like As for tomorrow at eight, that’s when the start will be.

Not in standard usage for this meaning.

Because the event is in the future, lesz is the natural choice:

• A kezdés holnap nyolckor lesz.

Van is present tense, so it would not fit well here.

However, Hungarian often uses the present tense for future meaning with many ordinary verbs:

• Holnap nyolckor kezdődik.
  This is present tense in form, but it can still mean a future event.

So:

• with a kezdés ... lesz → use lesz
• with a verb like kezdődik → present form can still refer to the future

Yes. Both are correct.

• nyolckor = at eight
• nyolc órakor = at eight o’clock

The version without óra is very common in everyday speech. The version with óra is a bit more explicit.

Yes, several.

For example:

• Holnap nyolckor kezdődik. = It starts tomorrow at eight.
• A program holnap nyolckor kezdődik. = The program/event starts tomorrow at eight.
• A kezdés időpontja holnap nyolc óra. = The start time is tomorrow at eight.
  (This one is more formal or context-specific.)

So the original sentence is natural, but not the only way to express the idea.

The main things to notice are:

• Hungarian stress is always on the first syllable: KEZdés
• é is a long vowel, somewhat like the vowel in say, but pure and not gliding
• s in Hungarian is pronounced like English sh

So kezdés sounds roughly like KEZD-aysh, with the stress at the beginning.

Also, nyolckor is pronounced with the c sounding like ts, so roughly nyolts-kor.