Data scadenței este mâine.

Because data in Romanian is the definite form of dată, which means date in the calendar sense.

• dată = a date
• data = the date

So data here is a false friend for English speakers: it looks like English data, but it does not mean that.

Because Romanian is using the genitive here: of the due date / of the maturity date.

The base noun is scadență. In this phrase, Romanian says:

• data scadenței
• literally: the date of the due date / of the maturity

That -ei ending marks the feminine singular definite genitive/dative form.

A useful pattern is:

• scadență = due date / maturity
• scadența = the due date
• scadenței = of the due date / to the due date

Because Romanian often expresses this kind of idea with a structure like:

• [definite noun] + [genitive noun]

So:

• data = the date
• scadenței = of the due date

Romanian puts the definite article on the end of the noun instead of using a separate word like English the.

So even though English might simply say the due date, Romanian may use a more literal structure like the date of the due date / of maturity.

It is a correct and natural expression, especially in formal or financial contexts.

Depending on context, you may also see:

• data de scadență = due date
• scadența = the due date / the maturity date

There can be small differences in style:

• data scadenței sounds a bit formal and explicit
• data de scadență is also very common
• scadența by itself may be enough when the context is clear

Scadență usually refers to a due date, especially for payments, bills, loans, invoices, or other obligations. In finance, it can also mean maturity.

So this sentence most naturally fits a financial or administrative context, such as a bill or payment.

For a more general deadline, Romanian often uses:

• termen-limită = deadline

Este is the 3rd person singular of a fi, meaning to be.

So:

• este = is

The sentence structure is:

• Data scadenței = the subject
• este = is
• mâine = tomorrow

So the sentence is built just like English The due date is tomorrow.

Yes. In everyday Romanian, e is a very common shorter form of este.

So these both work:

• Data scadenței este mâine.
• Data scadenței e mâine.

The version with este sounds a bit fuller or slightly more formal, while e is very common in speech.

Because mâine is an adverb of time, meaning tomorrow.

Like English tomorrow, it does not need a preposition here.

So:

• este mâine = is tomorrow

You would not normally add a preposition in this sentence.

Yes, but the original order is the most neutral:

• Data scadenței este mâine.

You can also move mâine for emphasis, for example:

• Mâine este data scadenței.

That can sound more like:

• Tomorrow is the due date
• or It’s tomorrow that the due date is

So the meaning stays very close, but the emphasis changes.

A rough guide is:

• sca-DEN-tsey

A few important sounds:

• ț = ts, like the end of cats
• ei here sounds roughly like ey in they, though Romanian vowels are usually cleaner and shorter

So scadenței is approximately:

• ska-DEN-tsey

A rough guide is:

• MY-nye or MUH-ee-neh is not quite right, so be careful

A better approximation is:

• MUH-ee-neh is too broken up
• think of something close to MY-neh, but with a specifically Romanian vowel in mâ

More importantly:

• â is a Romanian central vowel with no exact English equivalent
• stress is on the first syllable: MÂI-ne

So the whole word is roughly:

• MÂI-ne

Yes:

• Data = the date
• scadenței = of the due date / of maturity
• este = is
• mâine = tomorrow

Very literally:

• The date of the due date is tomorrow

Natural English:

• The due date is tomorrow