Libur sekolah kami biasanya dimulai pada April.

Libur sekolah means school holiday or school break. In Indonesian, libur can mean a holiday, a day off, or time when regular activity stops.

Liburan sekolah is also very common and usually means school vacation. The difference is small:

• libur often sounds a little simpler or more general
• liburan often sounds more like the vacation period itself

In this sentence, libur sekolah is perfectly natural.

Here, kami means our.

In Indonesian, possession usually works as noun + possessor, so:

• rumah saya = my house
• guru mereka = their teacher
• libur sekolah kami = our school holiday(s)

So even though kami by itself means we/us, after a noun it functions like our.

Both can be translated as we, but they are different:

• kami = we, excluding the listener
• kita = we, including the listener

So libur sekolah kami means our school holiday(s) from the speaker’s group point of view, without necessarily including the person being spoken to.

If the speaker and listener are talking about a shared school calendar, kita could be possible in another context, but kami is a normal choice here.

In Indonesian, the main noun usually comes first, and words that describe it come after it.

So:

• libur = holiday / break
• sekolah = school

Together, libur sekolah means school holiday.

This is a common pattern in Indonesian:

• seragam sekolah = school uniform
• buku sejarah = history book
• murid sekolah = school student

Biasanya means usually. It is an adverb of frequency.

In this sentence, it tells you that this is the normal pattern, not a one-time event:

• Libur sekolah kami biasanya dimulai pada April = our school holidays usually begin in April

Its position is flexible. You could also say:

• Biasanya, libur sekolah kami dimulai pada April.

Both are natural.

Dimulai comes from mulai, which means begin or start.

The prefix di- makes it a passive form, so dimulai literally means is begun or is started.

In English, we often say the holiday begins, but Indonesian often uses this passive-style form very naturally:

• Libur sekolah kami biasanya dimulai pada April = our school holidays usually begin in April

So even if it looks more passive than English, it is normal Indonesian.

Yes, you often can.

For example:

• Libur sekolah kami biasanya mulai bulan April

That sounds natural, especially in conversation.

However, dimulai sounds a bit more complete and slightly more formal or written. So the original sentence is a very standard and correct version.

Pada is a standard Indonesian preposition for time expressions, especially in more careful or formal language.

So:

• pada April = in April

In everyday speech, people may also say:

• bulan April
• di bulan April

You may hear di April in casual speech, but pada April is more standard in a sentence like this.

Indonesian does not use articles like a, an, or the.

Whether something is definite or indefinite is usually understood from context. So libur sekolah kami naturally means our school holidays without needing a separate word for the.

Indonesian often does not mark plural when the meaning is already clear from context.

A word can refer to one thing, several things, or a whole period, depending on the situation. Here, libur sekolah is understood as the school holiday period, so no extra plural marking is needed.

That is very normal in Indonesian.

Yes. Names of months are capitalized in Indonesian, so April should be written with a capital A.

The same is true for other months such as Januari, Mei, and Desember.