Saya dan kakak laki-laki saya berencana ikut acara kampus pada Oktober.

In Indonesian, kakak means older sibling. By itself, it does not tell you whether the sibling is male or female.

• kakak laki-laki = older brother
• kakak perempuan = older sister

So kakak laki-laki saya means my older brother.

This is different from:

• adik = younger sibling
• adik laki-laki = younger brother
• adik perempuan = younger sister

The second saya shows possession: my older brother.

So the sentence structure is:

• Saya = I
• dan = and
• kakak laki-laki saya = my older brother

Indonesian often repeats the possessor this way. It is completely normal.

You usually cannot drop that second saya here, because then kakak laki-laki would just mean an older brother or older brother in a general sense, not clearly my older brother.

Because the sentence specifically names the two people: I and my older brother.

Indonesian can say:

• Saya dan kakak laki-laki saya... = My older brother and I...
• Kami... = We...

If the speaker wants to clearly identify who we are, naming them is more precise.

Also, kami means we excluding the listener. If the listener is included, Indonesian would use kita instead. But in this sentence, the speaker is not just saying we; they are explicitly saying who the two people are.

Both are understandable.

• Saya dan kakak laki-laki saya = I and my older brother
• Kakak laki-laki saya dan saya = My older brother and I

In English, learners are often taught to prefer my older brother and I, but Indonesian is more flexible. Starting with saya is not wrong.

That said, some speakers may prefer putting themselves second in more polite or formal contexts, but this is not a strict grammar rule.

Berencana means to plan or to have a plan.

So:

• berencana ikut = plan to join / plan to attend

It shows intention, not an action that is already happening. The sentence is talking about a future plan.

Indonesian often does not need a separate word like English to before a verb.

So:

• berencana ikut literally looks like plan join
• but naturally means plan to join or plan to attend

You may also see:

• berencana untuk ikut

Here untuk can appear, but it is often omitted in everyday Indonesian. Both are possible, though the version without untuk is very common.

Ikut is a very common Indonesian verb with meanings like:

• join
• take part
• go along
• participate
• sometimes attend, depending on context

In this sentence, ikut acara kampus means something like:

• join the campus event
• take part in the campus event
• attend the campus event

So ikut is broader than one exact English word.

Both can work, but they have slightly different feels.

• ikut acara kampus sounds natural and common in everyday speech
• mengikuti acara kampus is more formal and can sound slightly more explicit, like to participate in / attend

In many casual contexts, Indonesians prefer the shorter ikut.

So:

• berencana ikut acara kampus = very natural
• berencana mengikuti acara kampus = also correct, a bit more formal

Literally, it is:

• acara = event
• kampus = campus

Together, acara kampus means campus event, college event, or university event.

Indonesian often puts nouns together like this, without a separate word like of.

So:

• acara kampus = campus event
• literally something like event campus

This noun-noun pattern is very common in Indonesian.

It can mean the physical campus, but in many contexts it also refers more generally to college/university life or the university environment.

So acara kampus usually means an event connected with the university or college, not necessarily just something happening in a physical location called the campus.

Depending on context, English translations could be:

• campus event
• college event
• university event

Pada is a preposition often used for time expressions, especially in more neutral or formal Indonesian.

So:

• pada Oktober = in October

This is natural and correct.

You may also hear:

• di bulan Oktober
• bulan Oktober

In everyday speech, Indonesians have some flexibility with time expressions, but pada Oktober is a good standard phrasing.

Some people do say di Oktober in casual usage, but pada Oktober is generally better in standard Indonesian when talking about time.

A useful guideline is:

• di is mainly for places
• pada is often used for times and occasions

So for learners, pada Oktober is the safer choice.

Indonesian does not change verb forms the way English does for tense. There is no special future verb ending here.

The future meaning comes from context:

• berencana = plan
• pada Oktober = in October

Together, they show that this is about a future action.

This is very common in Indonesian: time is often understood from context, time words, or verbs like akan, ingin, berencana, and so on.

Indonesian does not use articles the same way English does.

So:

• acara kampus can mean a campus event or the campus event, depending on context

The listener usually understands from the situation whether the speaker means a specific event or just a campus event in general.

This is normal in Indonesian and one of the things English speakers need to get used to.

It is fairly neutral and natural. A few parts make it sound a bit more standard or careful:

• saya is more neutral/formal than aku
• pada Oktober sounds a bit more formal than some everyday alternatives

So the sentence is suitable for standard spoken Indonesian and writing.

A more casual version might be something like:

• Aku dan kakak laki-lakiku rencana ikut acara kampus bulan Oktober.

But the original sentence is clearer and more standard for learners.

Yes, if the gender is already clear or not important.

• kakak saya = my older sibling / my older brother / my older sister
• kakak laki-laki saya = my older brother

So the original sentence is more specific. If you want to clearly say older brother, keeping laki-laki is helpful.

In everyday conversation, though, Indonesians often just say kakak saya if the listener already knows who they mean.