Jesteśmy dzisiaj na mieście.

Na mieście is an idiomatic expression. It usually means something like out in town, out and about, or out in the city, often with a social feel: meeting people, eating out, shopping, walking around, etc.

So it is not just a dry statement of location. It often suggests that someone is spending time out in town rather than staying at home.

Because after na when it means location, Polish usually uses the locative case.

• basic form: miasto = town / city
• locative form: mieście

So:

• na mieście = in town / out in town

This is one of the key things English speakers have to get used to: Polish nouns change form depending on their role in the sentence.

This is one of those places where Polish does not match English word-for-word.

• w mieście usually means in the city/town in a more literal, geographic sense
• na mieście is more idiomatic and often means out in town, especially as an activity or situation

So if you say:

• Jesteśmy w mieście → We are in the city
• Jesteśmy na mieście → We are out in town

The second one often sounds more like you are out doing things, not just physically located there.

Jesteśmy is the 1st person plural present tense of być, which means to be.

It means we are.

A very common mini-conjugation is:

• jestem = I am
• jesteś = you are
• jest = he/she/it is
• jesteśmy = we are
• jesteście = you are, plural
• są = they are

So in this sentence, jesteśmy already contains the idea of we.

Because in Polish, the verb form often already tells you who the subject is.

• jesteśmy already means we are

So my = we is usually unnecessary unless you want emphasis or contrast.

For example:

• Jesteśmy dzisiaj na mieście. = We are out in town today.
• My jesteśmy dzisiaj na mieście. = We are out in town today.
  This sounds more emphatic, like we are, maybe not someone else.

Yes. Polish word order is more flexible than English word order.

The sentence Jesteśmy dzisiaj na mieście is natural, but you could also hear:

• Dzisiaj jesteśmy na mieście
• Jesteśmy na mieście dzisiaj

They all mean roughly the same thing, but the emphasis changes a little.

• Dzisiaj jesteśmy na mieście puts more focus on today
• Jesteśmy dzisiaj na mieście is a very neutral, natural order
• Jesteśmy na mieście dzisiaj is possible, but a bit less neutral in many contexts

Yes, they both mean today.

• dzisiaj = today
• dziś = today

The difference is mostly stylistic and rhythmic:

• dzisiaj sounds a little fuller and very common in everyday speech
• dziś is shorter and also very common

So you could also say:

• Jesteśmy dziś na mieście

That sounds completely natural.

It is very common and natural in everyday speech, and it feels a bit colloquial because it is an idiomatic expression.

It is perfectly normal in conversation, text messages, and casual writing. In very formal writing, people might choose a less idiomatic phrasing depending on the context.

Not really in a way that helps you translate the sentence.

Although na often corresponds to on, prepositions in Polish do not match English neatly. In na mieście, you should learn the whole phrase as a unit.

So it is better to think:

• na mieście = out in town

rather than trying to understand it as literally on the town/city.

It is the locative singular form of miasto.

Singular forms of miasto include:

• miasto = nominative
• miasta = genitive
• miastu = dative
• miasto = accusative
• miastem = instrumental
• mieście = locative

So after na in this location meaning, you get:

• na mieście

A very useful related phrase is:

• Idziemy dzisiaj na miasto. = We are going into town today.

Notice the difference:

• na mieście = being out in town
• na miasto = going into town

So Polish often distinguishes:

• location → na mieście
• movement toward → na miasto

That contrast is very common and worth remembering.

Sometimes in context, yes, but the more natural feel of na mieście is usually out in town rather than just in town.

If you only want to state location with no idiomatic or social nuance, w mieście may be better:

• Jesteśmy dziś w mieście. = We are in town today.
• Jesteśmy dziś na mieście. = We are out in town today.

So the difference is subtle but real.

No. Polish does not have articles like a or the.

So miasto can mean a town, the town, a city, or the city, depending on context.

That is why na mieście works without any word corresponding to the.