Свято у серпні.

Because у here means in, and after у / в with the meaning of location or time, Ukrainian normally uses the locative case.

• серпень = August (dictionary form)
• у серпні = in August (locative form)

So the ending changes from -ень to -ні:

• серпень
• у серпні

This is very common with months:

• у січні = in January
• у травні = in May
• у серпні = in August

Here у means in.

In this sentence, it marks a time expression:

• у серпні = in August

Ukrainian often uses у and в interchangeably in this meaning. The choice is often made for smoother pronunciation rather than a difference in meaning.

In this sentence, there is usually no difference in meaning between у серпні and в серпні. Both mean in August.

The choice is mostly about euphony—what sounds smoother next to the surrounding words.

For example:

• Свято у серпні
• Свято в серпні

Both are correct. Native speakers often pick the version that sounds more natural in context.

Because Ukrainian often omits the present-tense form of to be.

So a sentence like:

• Свято у серпні.

can naturally mean something like:

• The holiday is in August.
• There is a holiday in August.
• A celebration is in August.

The exact English wording depends on context, but in Ukrainian this kind of verbless sentence is completely normal.

Yes. Свято is in the nominative singular form.

It is the basic dictionary form of the noun and acts as the main noun of the sentence.

A learner might expect some article-like distinction such as a holiday versus the holiday, but Ukrainian has no articles, so свято can mean:

• a holiday
• the holiday
• a celebration
• the celebration

Context tells you which one is meant.

Свято is a neuter noun.

You can often recognize neuter nouns because many of them end in -о or -е in the nominative singular.

Examples:

• свято = holiday, celebration
• місто = city
• море = sea

This matters because adjectives and pronouns that agree with свято will also take neuter forms.

It can mean several related things, depending on context.

Common meanings include:

• holiday
• celebration
• festival
• feast day

So Свято у серпні could refer to:

• a holiday that takes place in August
• a celebration in August
• a festival in August

The broader context would tell you which sense is intended.

Yes. Ukrainian word order is fairly flexible.

You could also say:

• У серпні свято.

Both this and Свято у серпні are grammatical, but the emphasis can shift slightly.

Very roughly:

• Свято у серпні puts свято first, so it may feel like you are introducing the holiday/celebration.
• У серпні свято puts the time first, so it may emphasize when it is.

In many simple contexts, both are natural.

It can be either, depending on context.

As a sentence, it works because Ukrainian can omit is:

• Свято у серпні. = The holiday is in August.

As a phrase, it could also be a heading or title:

• Свято у серпні = A holiday in August

So if you saw it by itself, either interpretation could be possible.

A helpful approximation is:

serp-nee

A few points:

• е sounds roughly like e in met
• рпн is a real consonant cluster, so the middle is compact
• the final ні has a soft n sound because of і

So серпні is not stretched into many syllables. It is basically two syllables:

• серп
• ні

That ending comes from the locative form of серпень.

The noun серпень ends in -ень in the nominative, but in the locative it becomes -ні:

• серпень
• у серпні

This pattern appears in several masculine nouns ending in -ень.

So it is not an irregular spelling you just have to memorize in isolation; it is part of a broader grammatical pattern.

Normally, months are not capitalized in Ukrainian unless they begin the sentence.

So:

• у серпні = correct
• у Серпні = normally incorrect

In your sentence, Свято is capitalized because it is the first word of the sentence, not because the noun itself normally requires a capital letter.