حضرتك جاية يوم السبت تقريبا الساعة كام؟

Because the sentence is addressed to a woman.

In Egyptian Arabic:

• جاي = coming, for a male
• جاية = coming, for a female

So:

• حضرتك جاي... = if you are speaking politely to a man
• حضرتك جاية... = if you are speaking politely to a woman

This is one of the main clues that tells you the listener is female.

حضرتك is a polite way to say you in Egyptian Arabic.

It literally comes from the idea of your presence, but in everyday speech it functions like a respectful you. It is very common when speaking to:

• someone older
• a stranger
• a customer
• someone you want to address politely

In this sentence, since the listener is female, it would normally be pronounced ḥaḍretik.
When speaking to a man, it is usually pronounced ḥaḍretak.

Important: the spelling حضرتك often looks the same in normal Arabic writing, so you usually understand the gender from context.

It is polite, but still very normal in everyday Egyptian Arabic.

It is not as stiff as very formal written Arabic. Egyptians use حضرتك a lot in ordinary polite conversation, especially in service situations or when showing respect.

If you were speaking more casually, you might say:

• إنتِ جاية يوم السبت تقريبًا الساعة كام؟ = to a female, informal
• إنتَ جاي يوم السبت تقريبًا الساعة كام؟ = to a male, informal

So حضرتك makes the sentence sound respectful and courteous.

In Egyptian Arabic, جاي / جاية is very often used as an active participle with a present or near-future meaning.

So جاية can mean:

• coming
• going to come
• are you coming

depending on context.

In everyday Egyptian, this is extremely common for movement and planned actions. So:

• إنتِ جاية إمتى؟ = When are you coming?
• هو جاي بكرة = He’s coming tomorrow

So even though it is not a full verb form like English are coming, it naturally expresses that idea.

يوم السبت literally means day of Saturday, but in normal English it simply means on Saturday.

Arabic often does not need a separate word matching English on in time expressions.

So:

• يوم السبت = on Saturday
• يوم الجمعة = on Friday

Also, in many situations Egyptians can simply say:

• السبت = Saturday / on Saturday

So both of these can be natural depending on context:

• جاية السبت؟
• جاية يوم السبت؟

تقريبا means approximately, roughly, or about.

Here it softens the question and means something like:

• about what time
• roughly what time
• around what time

So the speaker is not asking for an exact minute. They are asking for an approximate time.

Another common Egyptian word with a similar meaning is حوالي.
For example:

• حوالي الساعة كام؟ = around what time?

In this sentence, تقريبا works very naturally.

This is a very common Egyptian Arabic structure.

• الساعة = the hour / the time
• كام = how many / how much

So الساعة كام؟ literally looks like the hour how much?, but it idiomatically means:

• What time is it?
• What time?

When attached to a longer sentence, it means:

• at about what time?

A useful thing to notice is that كام often comes after the noun it asks about:

• الساعة كام؟ = what time?
• عمرك كام؟ = how old are you? (literally, your age how much?)
• السعر كام؟ = how much is the price?

Because Egyptian Arabic does not always move question words to the front the way English does.

In English, you say:

• What time are you coming?

In Egyptian Arabic, the natural structure is often closer to:

• You’re coming ... the time how much?

So كام stays where that information belongs in the sentence.

That is completely normal in Egyptian Arabic and is one of the patterns learners need to get used to.

Yes, there is some flexibility, but the original sentence is natural.

For example, you may also hear:

• حضرتك جاية يوم السبت الساعة كام تقريبًا؟
• حضرتك جاية السبت تقريبًا الساعة كام؟

These all mean roughly the same thing.

The original version:

• حضرتك جاية يوم السبت تقريبا الساعة كام؟

sounds like the speaker is asking, On Saturday, about what time are you coming?

Putting تقريبا before الساعة كام makes it clearly modify the time question.

Here are the most useful versions:

• حضرتك جاية يوم السبت تقريبا الساعة كام؟
  polite, to a woman

• حضرتك جاي يوم السبت تقريبا الساعة كام؟
  polite, to a man

• إنتِ جاية يوم السبت تقريبا الساعة كام؟
  informal, to a woman

• إنتَ جاي يوم السبت تقريبا الساعة كام؟
  informal, to a man

So the main things that change are:

• حضرتك vs إنتَ / إنتِ
• جاي vs جاية

A helpful pronunciation is:

ḥaḍretik gāyya yōm is-sabt taʔrīban is-sāʿa kām?

A few pronunciation notes:

• ج in Egyptian Arabic is usually pronounced like g in go
  so جاية sounds like gāyya

• ق is often pronounced as a glottal stop ʔ in Egyptian speech
  so تقريبا can sound like taʔrīban

• ال before س is pronounced with assimilation
  so:

  • السبت → is-sabt / es-sabt
  • الساعة → is-sāʿa / es-sāʿa

• حضرتك here, because the listener is female, is typically ḥaḍretik

No, not really.

Because of تقريبا, the question asks for an approximate time, not an exact one.

So the expected kind of answer would be something like:

• حوالي ٣ = around 3
• تقريبًا الساعة ٥ = approximately 5 o’clock
• بين ٤ و٥ = between 4 and 5

Without تقريبا, the question could sound a little more direct or exact:

• حضرتك جاية يوم السبت الساعة كام؟ = What time are you coming on Saturday?

With تقريبا, it becomes more like About what time are you coming on Saturday?