Η μέρα κλείνει ήρεμα στο σπίτι.

Η is the feminine singular definite article, so η μέρα means the day.

Greek often uses the article where English does, and sometimes even a bit more often. In this sentence, the speaker is talking about the day as a specific thing, so η is natural.

Also, μέρα is feminine, which is why the article is η.

It is in the nominative case, because it is the subject of the sentence.

• η μέρα = the day
• it is the thing that κλείνει (ends / winds down / closes)

So the basic structure is:

• η μέρα = subject
• κλείνει = verb
• ήρεμα = adverb
• στο σπίτι = place

Literally, κλείνει comes from κλείνω, which often means to close.

But in this sentence, it is being used more figuratively. With η μέρα, it means something like:

• the day comes to a close
• the day winds down
• the day ends

So yes, the literal idea is closes, but the natural English meaning is more like winds down or comes to an end.

Because the subject is η μέρα (the day), which is:

• third person
• singular

So Greek uses the matching verb form:

• κλείνω = I close
• κλείνεις = you close
• κλείνει = he/she/it closes

Since η μέρα is grammatically singular, the verb must also be singular: κλείνει.

Yes, κλείνει is present tense.

In Greek, the present tense can describe:

• something happening now
• a general situation
• a vivid descriptive scene

So Η μέρα κλείνει ήρεμα στο σπίτι can sound like:

• The day is winding down quietly at home
• The day ends quietly at home
• The day closes peacefully at home

The exact English wording depends on style. Greek present tense is often very natural in descriptive sentences like this.

Ήρεμα is an adverb. It means:

• calmly
• quietly
• peacefully

It describes how the day is ending.

So:

• κλείνει = ends / winds down
• ήρεμα = calmly / quietly

Together: ends quietly or winds down peacefully.

They are closely related:

• ήρεμος = calm, quiet, peaceful (adjective)
• ήρεμα = calmly, quietly, peacefully (adverb)

So:

• ήρεμη μέρα = a calm day
• κλείνει ήρεμα = it ends calmly

This is a very common pattern in Greek: the adjective and adverb are related, but they do not work the same way in the sentence.

Στο σπίτι literally means in the house or at home, depending on context.

It is made from:

• σε = in, at, to
• το = the

These combine into:

• στο = in the / at the / to the

And then:

• σπίτι = house / home

So στο σπίτι can mean:

• in the house
• at home

In this sentence, at home is usually the most natural translation.

In Modern Greek, the preposition σε is used for both:

• location: at / in
• direction: to

It is followed by the accusative case.

So:

• στο σπίτι = σε + το σπίτι
• σπίτι here is in the accusative

A useful detail: σπίτι is a neuter noun, and in the singular its nominative and accusative forms are the same, so it still looks like σπίτι.

It can mean both, depending on context.

• house = the physical building
• home = the place where someone lives, with a more personal feeling

In στο σπίτι, Greek very often means at home in the natural English sense.

So in this sentence, at home is probably the best translation.

Greek word order is more flexible than English word order.

This sentence is perfectly natural as:

• Η μέρα κλείνει ήρεμα στο σπίτι.

But Greek can move parts around for emphasis or style. For example:

• Στο σπίτι η μέρα κλείνει ήρεμα.
  = puts more emphasis on at home

Even so, not every order sounds equally natural in every context. The given order feels smooth and neutral: subject, verb, manner, place.

Both can relate to something ending, but they are not exactly the same.

• τελειώνει = ends, finishes
• κλείνει = closes, comes to a close, winds down

With η μέρα, κλείνει can sound a bit more:

• descriptive
• atmospheric
• literary
• gentle

So Η μέρα κλείνει ήρεμα has a slightly softer, more evocative feeling than Η μέρα τελειώνει ήρεμα.

Yes, it has a slightly poetic or literary feel.

A day does not literally close in the physical sense, so Greek is using an image similar to English expressions like:

• the day winds down
• the day comes to a close

So the sentence sounds natural, but a little more expressive than a plain factual sentence.

Yes.

• ημέρα is the fuller form
• μέρα is the very common everyday form

Both mean day. In modern everyday Greek, μέρα is extremely common and natural.

So Η μέρα κλείνει ήρεμα στο σπίτι sounds normal and idiomatic.