Mam dziś odebrać paczkę z paczkomatu po pracy.

Here mam does not mean possession, like I have a book. In mam dziś odebrać..., the pattern mam + infinitive means something like I am supposed to..., I am to..., or I have to... because of a plan, arrangement, or expectation.

So the sentence suggests an obligation or scheduled intention: I’m supposed to pick up the package today after work.

Both can often be translated as I have to pick up, but the nuance is different.

• mam odebrać = I’m supposed to pick it up / I’m meant to pick it up
  This often sounds like a plan, instruction, or arrangement.
• muszę odebrać = I must / I need to pick it up
  This sounds stronger and more direct, focusing on necessity.

So mam dziś odebrać paczkę... can feel a bit softer and more situational than muszę dziś odebrać paczkę....

Odebrać is the perfective form, while odbierać is imperfective.

In this sentence, the speaker means one complete action: picking up the parcel successfully. Polish usually uses the perfective verb for a single completed action like that.

• odebrać paczkę = to pick up / collect the parcel as a completed event
• odbierać paczkę = to be picking up, to pick up regularly, or to talk about the action more generally

Because this is about one specific parcel, odebrać is the natural choice.

Because paczkę is the accusative singular form of paczka.

The parcel is the direct object of the verb odebrać:

• nominative: paczka
• accusative: paczkę

So:

• paczka = the package as the subject
• odebrać paczkę = to pick up the package as the object

This is a very common pattern in Polish: feminine nouns ending in -a often change to -ę in the accusative singular.

Here z means from / out of, so it takes the genitive case.

That is why:

• paczkomat becomes paczkomatu

So z paczkomatu means from the parcel locker.

This is important because z can also mean with, and in that meaning it takes a different case:

• z paczkomatem would be instrumental, but that would not fit here

In this sentence, the meaning is clearly from the parcel locker, so z paczkomatu is correct.

Paczkomat is a parcel locker, especially the kind of automated locker where you collect online orders. It is a very common word in Poland because this delivery system is extremely popular.

So odebrać paczkę z paczkomatu means to collect a parcel from a parcel locker.

Po pracy means after work.

The preposition po in this time-related meaning takes the locative case, so:

• praca becomes pracy

Compare:

• po pracy = after work
• po obiedzie = after lunch
• po szkole = after school

So po pracy is a fixed and very common way to say after work.

Yes, Polish word order is flexible. Dziś is placed early here because it naturally highlights the time frame: today.

This sentence could also be rearranged, for example:

• Mam odebrać dziś paczkę z paczkomatu po pracy.
• Po pracy mam dziś odebrać paczkę z paczkomatu.
• Paczkę z paczkomatu mam dziś odebrać po pracy.

These versions are all possible, but they shift emphasis slightly. The original sounds natural and neutral.

Yes. Dziś and dzisiaj both mean today.

• dziś is a bit shorter and slightly more compact
• dzisiaj is equally common and natural

So you could also say: Mam dzisiaj odebrać paczkę z paczkomatu po pracy.

There is no major difference in meaning.

In Polish, subject pronouns are often omitted because the verb ending already shows who is doing the action.

• mam already means I have / I am supposed to

So Ja mam dziś odebrać... is grammatical, but ja is usually unnecessary unless you want contrast or emphasis, for example:

• Ja mam odebrać paczkę, nie ty.
  I’m the one who is supposed to pick up the package, not you.

In a neutral sentence, leaving out ja is the normal choice.

It can correspond to several English verbs depending on context: pick up, collect, receive. In this sentence, because of z paczkomatu, the best translation is pick up or collect.

So:

• odebrać paczkę z paczkomatu = pick up / collect the parcel from the parcel locker

The verb odebrać often has the idea of taking something that is ready for you.

It suggests a fairly definite expectation or plan, not just a vague possibility.

Because of mam odebrać, the speaker sounds like they are expected or intended to do it. It is stronger than just saying something like może odbiorę (maybe I’ll pick it up).

So the sentence gives the feeling of: That’s what I’m supposed to do today, after work.

Yes. Polish allows that, and the sentence would still be correct.

For example:

• Mam po pracy odebrać paczkę z paczkomatu.
• Po pracy mam odebrać paczkę z paczkomatu.

These versions are natural too. The main difference is emphasis:

• po pracy earlier = stronger focus on after work
• dziś earlier = stronger focus on today

The original sentence balances both pieces of time information naturally.