Die sperdatum is vandag.

Die is the Afrikaans definite article, so it means the.

In Die sperdatum is vandag, die sperdatum means the deadline.

A useful thing for English speakers: Afrikaans does not have different words for the based on gender, like some other languages do. You generally just use die for the.

Sperdatum is a compound noun: two parts joined into one word.

• sper = related to closing off, blocking, or setting a limit
• datum = date

So sperdatum is literally something like cut-off date or deadline.

Afrikaans often forms nouns this way, and unlike English, it usually writes them as one word.

Because Afrikaans commonly writes compound nouns as a single word.

So where English often has:

• deadline
• school bus
• swimming pool

Afrikaans very often joins the parts:

• sperdatum
• skoolbus
• swembad

This is very normal in Afrikaans spelling.

This is the normal statement word order in Afrikaans:

subject + verb + rest

So here:

• Die sperdatum = subject
• is = verb
• vandag = time expression

That makes the sentence straightforward and natural.

Afrikaans main clauses usually keep the verb in the second position, so this sentence follows that pattern perfectly.

No. Afrikaans is much simpler here.

The verb is stays is with all subjects:

• Ek is = I am
• Jy is = you are
• Hy is = he is
• Ons is = we are
• Hulle is = they are

So in this sentence, is does not need to agree in different forms the way English does.

Vandag is a time word meaning today.

In this sentence, it tells you when the deadline is. It functions much like a time expression or adverb.

So the structure is basically:

The deadline + is + today

Yes. Vandag is die sperdatum is also correct.

When you move vandag to the front, you give it a bit more emphasis:

• Die sperdatum is vandag = neutral statement
• Vandag is die sperdatum = emphasis on today

This is very common in Afrikaans. Just remember that when something comes first, the verb still stays in the second position:

• Vandag is ... not
• Vandag die sperdatum is

Normally, you would say Die sperdatum is vandag.

Leaving out die would sound unusual in an ordinary sentence, because sperdatum is a singular countable noun and usually needs an article when you mean a specific deadline.

So:

• Die sperdatum is vandag. = natural
• Sperdatum is vandag. = generally unnatural in standard usage

A simple learner-friendly approximation is:

fun-DAKH or fun-DAKHh

A few notes:

• The v in Afrikaans is often pronounced more like an English f
• The stress is usually on the second syllable: van-DAG
• The final g is the guttural Afrikaans sound, not a hard English g

If you cannot make the guttural g yet, saying something close to fun-DAKH is a reasonable start.

It works in both.

Die sperdatum is vandag is perfectly natural in:

• everyday conversation
• school or university contexts
• workplace communication
• formal writing

It is a standard, neutral sentence.