A Capodanno restiamo a casa fino a tardi.

In Italian, a is often used to mean on with certain holidays and special occasions.

So a Capodanno means on New Year’s / at New Year.

It works similarly to:

• a Natale = at Christmas
• a Pasqua = at Easter

So here a is not really to. In this context, it marks the time when something happens.

Holiday names in Italian often appear without an article, especially after prepositions like a.

So Italian normally says:

• a Natale
• a Pasqua
• a Capodanno

not:

• al Capodanno in this kind of sentence

That article-free pattern is very common with feast days and holidays.

Literally, Capodanno refers to New Year’s Day / New Year.
However, in everyday use it can also refer more broadly to the New Year celebration period, including the night around midnight.

So in a sentence like A Capodanno restiamo a casa fino a tardi, the exact English translation may depend on context:

• On New Year’s we stay home until late
• At New Year we stay home until late
• sometimes even On New Year’s Eve... if the context is clearly about the celebration night

A learner should mainly remember that Capodanno is the standard Italian word connected with New Year.

Restiamo comes from restare, which here means to stay or to remain.

So:

• restiamo a casa = we stay home

It is very natural in Italian for talking about remaining somewhere instead of going out.

Both can sometimes relate to staying, but restare is especially common when the idea is remaining in a place.

• restare a casa = to stay/remain at home
• stare a casa = also possible, but often more general

In this sentence, restiamo a casa sounds very natural because it suggests we’re staying in rather than going elsewhere.

Restiamo is present indicative, first person plural:

• noi restiamo = we stay

Even though it is grammatically present tense, Italian often uses the present to talk about a planned future event, especially when the time is clear from context.

So here it can mean:

• We stay home on New Year’s or
• We’re staying home on New Year’s

Both ideas are possible.

Italian often leaves out subject pronouns because the verb ending already shows who the subject is.

Here:

• restiamo clearly means we stay

So noi is unnecessary unless you want emphasis or contrast.

Compare:

• Restiamo a casa. = We’re staying home.
• Noi restiamo a casa. = We’re the ones staying home / extra emphasis

A casa is a fixed, very common expression meaning at home or home.

So Italian says:

• sono a casa = I’m at home
• restiamo a casa = we stay home

Using alla casa would usually mean to the house, referring to a specific building, and that is not the normal way to say at home.

Sometimes yes, but the meaning is slightly different.

• a casa = at home / home
  This is the normal choice here.
• in casa = in the house / indoors / in the home environment

So:

• restiamo a casa = natural, everyday we stay home
• restiamo in casa = more specifically we stay inside the house

For this sentence, a casa is the most idiomatic choice.

Literally, it means until late.

It is a common Italian expression used to say that something continues late into the evening or night.

Examples:

• Abbiamo parlato fino a tardi. = We talked until late.
• Lavora fino a tardi. = He/She works until late.

So in your sentence:

• restiamo a casa fino a tardi = we stay home until late

Because tardi here is being used adverbially, meaning late.

It is not a noun phrase like the late hour. It is just the standard expression:

• fino a tardi = until late

Italian often uses adverbs this way in time expressions.

Yes. Italian word order is fairly flexible, especially when the meaning is already clear.

For example, these are possible:

• A Capodanno restiamo a casa fino a tardi.
• Restiamo a casa fino a tardi a Capodanno.

But the original version is very natural because it puts the time expression first, setting the scene right away: On New Year’s...

A helpful approximate pronunciation is:

• Capodanno: kah-poh-DAHN-no
• restiamo: reh-STYAH-mo

A few useful notes:

• the nn in Capodanno is doubled, so the consonant is held a bit longer
• ia in restiamo blends into something like yah
• stress falls on:
  • -dan- in Capodanno
  • -stia- in restiamo