वैधता कल समाप्त होगी।

A word-by-word breakdown is:

• वैधता = validity
• कल = tomorrow / yesterday (context decides)
• समाप्त = finished, ended
• होगी = will be

So the literal structure is something like Validity tomorrow ended will-be, which idiomatically means The validity will expire tomorrow or The validity will end tomorrow.

In Hindi, कल can mean either yesterday or tomorrow. The verb tells you which one is intended.

Here, होगी is future tense (will be), so कल must mean tomorrow. If the sentence were in the past, then कल could mean yesterday.

Because वैधता is a feminine singular noun.

In this kind of structure, होना often agrees with the subject:

• masculine singular: होगा
• feminine singular: होगी
• plural: होंगे / होंगी depending on gender and usage

Since वैधता is feminine, the sentence uses होगी.

Hindi often uses समाप्त होना to mean to end, to be over, or to expire.

So:

• समाप्त = ended / finished
• होना = to be / to become

Together, समाप्त होगी literally means will be finished / will be ended, but in natural English this is often translated as will expire when talking about validity, subscriptions, documents, passes, and similar things.

Yes, but it is somewhat formal. It is very common in official, legal, technical, or administrative contexts.

For example, you may see वैधता in:

• documents
• visas
• licenses
• certificates
• subscriptions
• official notices

In everyday speech, people may also use:

• वैलिडिटी (borrowed from English)
• खत्म हो जाएगी instead of समाप्त होगी

So this sentence is correct and natural, but it sounds a bit formal.

Yes. खत्म is more everyday and conversational, while समाप्त is a bit more formal.

So these are both possible:

• वैधता कल समाप्त होगी। = more formal
• वैधता कल खत्म होगी। = more conversational

In many real-life situations, speakers might even prefer:

• वैधता कल खत्म हो जाएगी।

That sounds especially natural in speech.

Hindi does not normally use articles like the and a/an the way English does.

So वैधता can mean:

• validity
• the validity
• its validity

The exact meaning depends on context. Hindi usually leaves this understood rather than marking it with a separate word.

The given order is natural, but Hindi word order is fairly flexible.

These are possible:

• वैधता कल समाप्त होगी।
• कल वैधता समाप्त होगी।

Both are understandable. The original sentence sounds neutral and natural.

In general, Hindi often places time words like कल, आज, अब, फिर before the verb, but there is some freedom depending on emphasis.

It can absolutely stand by itself if the context is already clear.

For example, if people are already talking about a visa, pass, coupon, or document, then वैधता कल समाप्त होगी। is enough.

If you want to be more explicit, you can say:

• पास की वैधता कल समाप्त होगी। = The pass’s validity will expire tomorrow.
• वीज़ा की वैधता कल समाप्त होगी। = The visa’s validity will expire tomorrow.

So the shorter sentence is fine when the subject is understood from context.

Both are correct, but they feel slightly different.

• समाप्त होगी = simple future, concise, formal, notification-like
• समाप्त हो जाएगी = also future, but often feels a bit more natural in everyday speech and emphasizes the change/event

So:

• वैधता कल समाप्त होगी। sounds neat and formal
• वैधता कल समाप्त हो जाएगी। sounds slightly fuller and often more conversational

You will hear both.

A simple learner-friendly pronunciation is:

vaidhtaa kal samaapt hogee

A slightly more careful breakdown:

• वैधता ≈ vaidh-taa
• कल ≈ kul / kal
• समाप्त ≈ samaapt
• होगी ≈ hogee

A few useful notes:

• ध is an aspirated dh
• ता has a long aa
• गी in होगी has a long ee sound

So the whole sentence sounds roughly like:

vaidh-taa kal samaapt ho-gee