Я люблю день.

Yes, Russian often can drop subject pronouns because the verb ending already shows the person and number.
So люблю by itself already means I love.

That means:

• Я люблю день. = I love day / the daytime
• Люблю день. = also possible, especially in conversation

Including я makes the subject more explicit and can add slight emphasis or clarity.

Люблю is the 1st person singular present-tense form of любить.

The infinitive is:

• любить = to love

Its present-tense forms include:

• я люблю = I love
• ты любишь = you love
• он/она любит = he/she loves
• мы любим = we love
• вы любите = you love
• они любят = they love

So люблю is used because the subject is я.

Yes, the direct object after люблю is in the accusative case.
The important point is that for many inanimate masculine nouns, the accusative singular looks exactly like the nominative singular.

So:

• nominative: день
• accusative: день

Even though the form does not visibly change, its grammatical role here is still accusative because it is the direct object of люблю.

День is a masculine noun.

That matters because Russian case endings depend partly on gender. In this sentence, it helps explain why the accusative singular stays the same as the nominative:

• masculine + inanimate → accusative often matches nominative

If this were an animate masculine noun, the accusative would often look different.

Russian has no articles like English a/an and the.

So день can mean:

• a day
• the day
• sometimes more generally daytime or day

The exact meaning depends on context. Russian speakers rely on context, word order, and surrounding sentences instead of articles.

It is grammatical, but by itself it can sound a little unusual or context-dependent.

A Russian speaker may wonder whether you mean:

• I love the daytime
• I love this day
• I love day as opposed to night

If you mean I love daytime, Russian often uses more natural phrases such as:

• Я люблю день больше, чем ночь. = I love the day more than the night.
• Я люблю дневное время. = I love the daytime.

So the sentence is understandable, but in real life it may need context to sound fully natural.

Yes. Russian word order is fairly flexible because cases and verb endings show the grammar.

For example:

• Я люблю день.
• День я люблю.

Both can work, but the emphasis changes.

• Я люблю день. = neutral
• День я люблю. = emphasizes day; maybe contrasting it with something else, such as night

So word order in Russian often affects focus and style, not just basic meaning.

День is pronounced approximately like den’, with a soft n sound at the end.

The ь is the soft sign. It does not have its own sound, but it makes the preceding consonant soft (palatalized).

So:

• ден would sound wrong in standard Russian
• день has a softened final н

This softness is an important part of the word’s pronunciation and spelling.

Любить is an imperfective verb, and that is normal because to love usually describes a state, feeling, or ongoing attitude, not a single completed action.

Russian perfective verbs are usually used for completed events, but love in this sense is not usually treated that way.

So:

• Я люблю день. = I love day / the daytime

This is the normal way to express that idea.

Yes, very possibly. Russian день can refer to:

• a calendar day
• the daytime part of the day
• day in contrast with night

Without context, the sentence can be interpreted in more than one way. That is one reason learners may find it slightly vague on its own.

If the intended meaning is specifically daytime, context usually makes that clear.