W piątek mam dyżur do ósmej, dlatego nie przyjdę na zebranie.

Dyżur means something like a duty shift, being on duty, or being assigned to cover a certain time period.

So mam dyżur means I am on duty or I have a shift/duty period.

Depending on context, dyżur can be:

• a doctor’s shift
• a teacher’s duty
• a work rota shift
• a person being responsible for something at a given time

So here, W piątek mam dyżur do ósmej means On Friday I’m on duty until eight.

In Polish, it is very natural to say mam dyżur, literally I have duty.

This is just the normal idiomatic way to express the idea. Polish often uses mieć + noun where English might use a different structure.

Compare:

• mam czas = I have time
• mam spotkanie = I have a meeting
• mam dyżur = I am on duty / I have a duty shift

So even though it sounds a bit literal from an English perspective, mam dyżur is exactly what a Polish speaker would normally say.

Because after w when talking about days of the week in the sense of when something happens, Polish uses the accusative form.

So:

• w piątek = on Friday
• w poniedziałek = on Monday
• w wtorek = on Tuesday

This is a fixed and very common pattern.

A useful shortcut:

• w
  • day of the week usually means on that day
• and the form is typically the accusative

So W piątek mam dyżur = On Friday I have duty / I’m on duty.

In this sentence, it most naturally means this Friday or on Friday, referring to a specific upcoming Friday.

If you wanted to say on Fridays in a repeated, habitual sense, Polish would usually say:

• W piątki mam dyżur = I’m on duty on Fridays

So:

• w piątek = on Friday, one specific Friday
• w piątki = on Fridays, regularly

Because the preposition do requires the genitive case.

The basic number is:

• osiem = eight

But after do, it changes:

• do ósmej = until eight

This is very common with telling time:

• do pierwszej = until one
• do drugiej = until two
• do ósmej = until eight

So the form changes because of grammar: do + genitive.

Because there is an understood word here: godziny.

Polish often omits godzina/godziny when telling time, but the adjective or numeral still agrees with that hidden noun.

So:

• do ósmej really means do ósmej godziny or more naturally until eight o’clock

Since godzina is feminine, the form is feminine too:

• ósma godzina = the eighth hour
• do ósmej = until the eighth hour / until eight

This is why the form is not based directly on osiem as a plain number, but on the time expression built around godzina.

Dlatego means therefore, that’s why, or for that reason.

In this sentence:

• W piątek mam dyżur do ósmej, dlatego nie przyjdę na zebranie.
• On Friday I’m on duty until eight, that’s why I won’t come to the meeting.

It introduces the result or consequence of the first part.

A useful contrast:

• ponieważ / bo = because
• dlatego = therefore / that’s why

So:

• Nie przyjdę, bo mam dyżur. = I won’t come because I’m on duty.
• Mam dyżur, dlatego nie przyjdę. = I’m on duty, therefore I won’t come.

Because dlatego introduces a second clause that explains the consequence of the first one.

In Polish, commas are used more regularly than in English to separate clauses. Here you have:

• clause 1: W piątek mam dyżur do ósmej
• clause 2: dlatego nie przyjdę na zebranie

So the comma helps mark the division clearly.

Even if English punctuation can sometimes feel looser in similar sentences, in Polish this comma is normal and expected.

Because nie przyjdę refers to one future event: the speaker will not come to that meeting.

• przyjdę = I will come
• nie przyjdę = I will not come

By contrast:

• nie przychodzę is present tense and usually means I’m not coming or I don’t come, depending on context
• it can sometimes refer to the near future in conversation, but here nie przyjdę is clearer and more standard for a single future action

Also, przyjść is a perfective verb, so its present-form endings actually express future meaning:

• przyjdę = I will come

This is a very important feature of Polish aspect.

Przyjść is a perfective verb. Perfective verbs do not normally have a true present tense for ordinary use. Their present-looking forms refer to the future.

So:

• przychodzę from przychodzić = I am coming / I come
• przyjdę from przyjść = I will come

Why use the perfective here? Because the sentence is about a completed, one-time event: attending the meeting or not attending it.

So nie przyjdę na zebranie means I won’t come to the meeting as a single future action.

Because na zebranie expresses movement toward the meeting, while na zebraniu expresses location at the meeting.

Compare:

• przyjść na zebranie = to come to the meeting
• być na zebraniu = to be at the meeting

This is a very common Polish pattern:

• na
  • accusative = motion toward an event/place
• na
  • locative = being at that event/place

So here:

• nie przyjdę na zebranie = I will not come to the meeting

Normally no, not in this meaning.

With events like meetings, classes, parties, lectures, and concerts, Polish very often uses na:

• na zebranie = to the meeting
• na lekcję = to class
• na koncert = to the concert

Using do would usually suggest movement into a physical place or container-like destination, not attendance at an event.

So for a meeting, na zebranie is the natural choice.

Yes, Polish word order is quite flexible, though some versions sound more natural than others depending on emphasis.

The original sentence is neutral and natural:

• W piątek mam dyżur do ósmej, dlatego nie przyjdę na zebranie.

You could also say:

• Dlatego nie przyjdę na zebranie, bo w piątek mam dyżur do ósmej.
• Na zebranie nie przyjdę, bo w piątek mam dyżur do ósmej.

Changing the order changes the emphasis:

• putting na zebranie earlier can emphasize the meeting
• putting dlatego first can emphasize the conclusion

But the original version is a very standard, natural way to say it.

Zebranie usually means a meeting, especially a somewhat organized or formal one, such as:

• a staff meeting
• a school meeting
• a committee meeting
• a residents’ meeting

It is often a gathering with a purpose or agenda.

Other Polish words for types of meetings include:

• spotkanie = meeting, gathering, get-together, appointment
• narada = consultation, briefing, deliberation
• posiedzenie = session, sitting, formal meeting

So zebranie here suggests a fairly ordinary organized meeting, not necessarily a casual social meetup.