الموعد المسا.

A good pronunciation guide is:

el-mowʿed el-masa

A few notes:

• الـ is usually pronounced el- in Egyptian Arabic.
• In موعد, the letter ع is the difficult sound. It is a deep throat sound with no exact English equivalent.
• المسا is said el-masa, with the last sound open, not like the full Standard Arabic المساء with a clear final glottal stop.

So the whole phrase is roughly:

el-mowʿed el-masa

Because Arabic often leaves out the verb to be in the present tense.

So where English says:

The appointment is in the evening

Arabic can simply say:

الموعد المسا

This is a very common feature of Arabic. The sentence is still complete even without a separate word for is.

الـ is the definite article, like the in English.

So:

• الموعد = the appointment / the موعد
• المسا = the evening

In Arabic, it is normal for both parts of this kind of sentence to be definite. English would not usually say the appointment the evening, but Arabic structure works differently here.

المسا is the Egyptian colloquial form.

In Standard Arabic, you usually see:

المساء

In Egyptian Arabic, people commonly shorten it in both speech and informal writing to:

المسا

So this is a very normal colloquial Egyptian spelling and pronunciation.

It is understood as a full sentence.

Here, الموعد is the topic, and المسا gives the time information. So the structure is something like:

• the appointment
  • in the evening

It is not an iḍāfa construction like the evening’s appointment, because in an iḍāfa the first word normally would not take الـ. Since الموعد already has الـ, learners should read this as a sentence, not as a noun phrase.

Not necessarily.

In Arabic, especially in everyday speech, time expressions often appear without a preposition. So الموعد المسا can work as a short natural way to express the time.

That said, a speaker might also say a more explicit version in some contexts, such as:

• الموعد في المسا
• الموعد بالليل depending on the exact meaning and situation

So omitting the preposition here is not strange.

It is understandable, but in everyday Egyptian Arabic, الميعاد is often more common than الموعد.

So a very colloquial Egyptian learner might hear or use:

الميعاد المسا

while الموعد can sound a bit more formal or closer to Standard Arabic.

So the sentence is understandable, but learners should know that ميعاد is very frequent in real Egyptian speech.

Because the next letter is م, and م is a moon letter, not a sun letter.

That means the ل in الـ stays audible:

• el-mowʿed
• el-masa

If the next letter were a sun letter, the l sound would usually disappear into the next consonant.

Not always.

• المسا usually means the evening
• بالليل usually means at night

In casual speech, the boundary can be a little flexible, but they are not exactly identical. So if the meaning shown to you is specifically about evening, المسا is the better match.

Normally, no—not in a neutral way.

The natural order here is:

الموعد المسا

That puts the topic first, then the time information. Reversing it would sound unusual unless there were a special emphasis or a different context. For a learner, it is best to keep the order exactly as given.