حظي حلو النهارده.

Word by word, it breaks down like this:

• حظي = my luck
• حلو = good / nice / sweet
• النهارده = today

So the sentence is literally something like My luck is good today, which is a very natural Egyptian Arabic way to express the idea.

A good learner-friendly pronunciation is:

ḥazzi ḥelw en-naharda

A few notes:

• ح is a stronger, breathier h than English h
• حظي is often pronounced roughly like hazzi or ḥazzi in Egyptian speech
• حلو is commonly pronounced ḥelw
• النهارده is usually en-naharda in Egyptian Arabic

You do not need to pronounce it in a very formal way. A natural Egyptian pronunciation will sound smoother and more relaxed than a careful letter-by-letter reading.

Because in Arabic, especially in the present tense, sentences like this usually do not use a separate verb for is/am/are.

So:

• حظي حلو = My luck is good
• not حظي هو حلو in normal speech

This is very normal in both Egyptian Arabic and Standard Arabic-type structures. English needs is, but Arabic usually leaves it out in the present.

The -ي at the end is the possessive suffix meaning my.

So:

• حظ = luck
• حظي = my luck

This suffix is extremely common in Arabic. You will see it with many nouns:

• بيتي = my house
• اسمي = my name
• صاحبي = my friend

So here, حظي is simply luck + my.

Because حظ is grammatically masculine singular, so the adjective also appears in the masculine singular form:

• حظ حلو = good luck
• حظي حلو = my luck is good

If the noun were feminine, the adjective would usually take the feminine form -ة:

• فرصة حلوة = a good/nice opportunity

So حلو is used here because it agrees with حظ.

Yes, حلو literally can mean sweet, but in Egyptian Arabic it is used much more broadly than that.

It can mean:

• sweet
• nice
• good
• pretty
• pleasant
• great

In this sentence, حلو does not mean sugary or sweet in taste. It means something like good or favorable. So حظي حلو means your luck is going well.

النهارده is the Egyptian Arabic word for today. It is very common in everyday speech.

It is colloquial Egyptian, not the usual Standard Arabic form. In Standard Arabic, you would normally say:

• اليوم = today

So this sentence is clearly Egyptian dialect, not Modern Standard Arabic.

Yes, very natural. It sounds casual and idiomatic.

An Egyptian speaker might say this when:

• things are going well for them
• they are unexpectedly succeeding
• they feel especially lucky that day

It can sound a bit like:

• I’m lucky today
• My luck is good today
• Today is a lucky day for me

So this is not a strange word-for-word translation from English; it is a normal Egyptian way to say it.

Yes, you can. أنا محظوظ النهارده means I’m lucky today, and it is also understandable and natural.

The difference is mainly in style:

• حظي حلو النهارده focuses on my luck
• أنا محظوظ النهارده focuses on me

The first one can feel a little more colloquial and idiomatic in Egyptian speech. The second one is also clear, but slightly more direct.

Yes, Arabic word order is somewhat flexible, especially in spoken language.

The basic sentence:

• حظي حلو النهارده

You might also hear:

• النهارده حظي حلو

Both are possible. The difference is emphasis:

• حظي حلو النهارده = neutral statement
• النهارده حظي حلو = puts more focus on today

So if you move النهارده to the front, it sounds like Today, my luck is good.