Ĉu hodiaŭ, ĉu morgaŭ, la akceptejo ricevas petojn.

This is a common Esperanto pattern: ĉu ... ĉu ... means whether ... or ....

So:

• ĉu hodiaŭ, ĉu morgaŭ = whether today or tomorrow

It presents two alternatives without making the whole sentence into a yes/no question.

This is different from the single ĉu used at the beginning of a normal yes/no question, such as:

• Ĉu vi venos? = Are you coming?

Here, the repeated ĉu is a linking structure, not a question marker for the whole sentence.

No. Even though it starts with ĉu, the sentence is not a yes/no question.

That is because ĉu ... ĉu ... is functioning as a fixed pair meaning whether ... or .... The main clause is:

• la akceptejo ricevas petojn
  = the reception office receives requests / accepts applications

So the sentence is a statement, not a question.

Both can refer to today or tomorrow, but the nuance is different.

• hodiaŭ aŭ morgaŭ = today or tomorrow
  This is the simple or.
• ĉu hodiaŭ, ĉu morgaŭ = whether today or tomorrow
  This feels more like in either case or regardless of which of the two.

So ĉu ... ĉu ... often sounds a bit more emphatic or formal. It highlights that the main statement is true in both possible cases.

The commas help separate the two parallel alternatives:

• ĉu hodiaŭ
• ĉu morgaŭ

This makes the structure clearer and easier to read. In Esperanto, commas are often used to mark off repeated or balanced expressions like this.

Because they are adverbs of time.

• hodiaŭ = today
• morgaŭ = tomorrow

In Esperanto, time adverbs can stand on their own without a preposition, just like in English:

• Mi venos morgaŭ. = I will come tomorrow.

So ĉu hodiaŭ, ĉu morgaŭ is perfectly normal without any extra word such as je or en.

Akceptejo is built from parts:

• akcept- = the root related to receive / accept
• -ej- = a suffix meaning place for or place where something happens
• -o = noun ending

So akceptejo literally means something like:

• place for receiving / accepting

Depending on context, it can mean something like:

• reception desk
• admissions office
• intake office
• receiving office

The exact English translation depends on the situation, but grammatically it is a place noun.

The article la means the.

Using la akceptejo suggests a specific, identifiable reception office or desk—the one relevant in the situation.

Without la, it would sound more general:

• Akceptejo ricevas petojn would sound like A reception office receives requests or Reception offices receive requests, depending on context.

So la makes it definite.

Because petojn is the direct object of ricevas.

• ricevi = to receive
• what does the office receive? petojn

In Esperanto, direct objects take -n.

Also:

• peto = one request
• petoj = requests
• petojn = requests, as a direct object

So the ending shows two things at once:

• -j = plural
• -n = accusative / direct object

In Esperanto, the present tense often expresses:

• something happening now
• a general fact
• a habitual action
• an official rule or standing arrangement

So la akceptejo ricevas petojn can mean something like:

• the reception office receives requests
• the reception office is accepting requests

Even if English might sometimes use will accept or accepts, Esperanto often uses the present tense for this kind of statement.

Yes. Esperanto word order is fairly flexible because endings show grammatical roles.

For example, the basic core is:

• la akceptejo ricevas petojn

And the time-related phrase can be moved around for emphasis.

But in this sentence, putting Ĉu hodiaŭ, ĉu morgaŭ first gives it special emphasis:

• Whether today or tomorrow, the reception office receives requests.

That fronted position highlights the contrast between the two possible times.

Grammatically, ricevas petojn literally means receives requests.

However, depending on context, peto can be translated in different ways:

• request
• petition
• application

And ricevi in an office context can sometimes be translated more naturally as:

• receive
• take
• accept

So the most natural English translation may vary, even though the Esperanto grammar is straightforward.

Most often, it links two alternatives, as in this sentence. That is the most common and easiest pattern for learners.

But in longer sentences, Esperanto can repeat the pattern for more than two possibilities if needed. Still, with two options, it is especially common and neat:

• ĉu hodiaŭ, ĉu morgaŭ

For everyday learning, it is best to remember it first as:

• ĉu A, ĉu B = whether A or B