Hãy nhắc tôi ngày mai.

Hãy marks a request, instruction, or gentle command. In Hãy nhắc tôi ngày mai, it helps create the sense of Please remind me tomorrow or Remind me tomorrow.

It is not exactly the same as English please, but in many cases it gives that kind of directive feeling.

A very rough breakdown is:

• hãy = imperative marker
• nhắc = remind
• tôi = me / I
• ngày mai = tomorrow

So the structure is basically [imperative marker] + [verb] + [object] + [time].

Yes, very often you can.

Vietnamese frequently leaves out hãy in everyday speech, especially when the meaning is already clearly a request. So:

• Hãy nhắc tôi ngày mai.
• Nhắc tôi ngày mai.

Both can mean Remind me tomorrow.

However, hãy can sound a bit more like a deliberate instruction. In normal conversation, people often prefer softer particles such as:

• Nhắc tôi ngày mai nhé.
• Mai nhắc tôi nhé.

These often sound more natural and friendlier in casual speech.

The subject is understood, not spoken.

In English, you say Remind me tomorrow, where you is implied. Vietnamese does the same thing very often in commands and requests. So in Hãy nhắc tôi ngày mai, the person being addressed is not named, but it is understood from context.

You could add a pronoun if needed, for example:

• Anh hãy nhắc tôi ngày mai.
• Em hãy nhắc tôi ngày mai.

But in many situations, that would be unnecessary.

Yes. Tôi is just one way to say I / me, and here it means me as the object of nhắc.

Vietnamese pronouns depend heavily on relationship, age, formality, and context. So instead of tôi, a speaker might say:

• mình
• tớ
• em
• anh
• chị

depending on who is speaking.

For example:

• Mai nhắc mình nhé. = Remind me tomorrow.
• Nhớ nhắc em ngày mai nhé. = Remember to remind me tomorrow.

So tôi is grammatically fine, but it may sound more neutral or formal than what close friends would usually say.

Yes, ngày mai can appear in different positions.

In Hãy nhắc tôi ngày mai, it comes at the end as a time expression, which is very normal in Vietnamese.

You can also say:

• Ngày mai hãy nhắc tôi.
• Mai nhắc tôi nhé.

All of these are possible. The difference is usually about focus or style, not basic meaning.

Very roughly:

• Hãy nhắc tôi ngày mai. = neutral
• Ngày mai hãy nhắc tôi. = puts more emphasis on tomorrow
• Mai nhắc tôi nhé. = casual and natural

Nhắc means to remind.

In this sentence, it means to remind someone of something / to prompt someone so they do not forget.

Common examples:

• Nhắc tôi ngày mai. = Remind me tomorrow.
• Nhắc tôi gọi điện. = Remind me to call.
• Nhắc tôi về cuộc hẹn. = Remind me about the appointment.

You may also see nhắc nhở, which is related but often feels more like to remind repeatedly / to admonish / to caution, depending on context. For simple everyday remind me, nhắc is usually enough.

Yes, it is grammatical and understandable, but depending on context it may sound a bit bookish or direct.

In everyday conversation, many speakers would say something more like:

• Mai nhắc tôi nhé.
• Ngày mai nhắc tôi nhé.
• Nhớ nhắc tôi ngày mai nhé.

Why?

• hãy can sound a bit formal or instructional in casual speech.
• nhé softens the request.
• nhớ adds the idea of remember to.

So Hãy nhắc tôi ngày mai is fine, but if you want very natural spoken Vietnamese, a softer version is often better.

In this sentence, ngày mai is most naturally understood as a time expression: tomorrow.

So the sentence means:

• Remind me tomorrow
  not
• Remind me about tomorrow

If you wanted about tomorrow, Vietnamese would usually need extra wording, for example:

• Nhắc tôi về ngày mai.
• Nhắc tôi chuyện ngày mai.

So in Hãy nhắc tôi ngày mai, the default reading is that the reminding happens tomorrow.

A rough pronunciation guide is:

• Hãy ≈ like high, but with a Vietnamese tone
• nhắc ≈ somewhat like nyuk / nyuck with a short vowel and a final k
• tôi ≈ roughly toy
• ngày ≈ roughly nguy / ngai depending on accent, but not exactly either one
• mai ≈ like my

A few important points:

• nh is pronounced like the ny sound in canyon or onion
• ng in ngày is the Vietnamese ng sound, like the end of sing, but it can appear at the beginning of a syllable
• Vietnamese tones are essential, so even if the consonants and vowels are close, the wrong tone can change how natural or understandable you sound

If you are learning pronunciation, it is best to listen to native audio and copy the full rhythm of the sentence, not just the individual words.