Hallå, tidsfristen är idag!

Here, Hallå is an attention-getter, something like Hey or Hello at the start of a reminder. It is not as neutral as hej. Depending on tone, hallå can sound friendly, urgent, surprised, or even slightly annoyed.

So in this sentence, it feels like someone is trying to make sure the listener pays attention right now.

Because Swedish is using the definite form: the deadline, not just a deadline.

The noun is:

• en tidsfrist = an indefinite form
• tidsfristen = the definite form

Swedish usually puts the definite article at the end of the noun as a suffix, instead of using a separate word like the in English. So -en here means the.

Tidsfrist is a common gender noun, so its indefinite article is en.

That gives you:

• en tidsfrist
• tidsfristen

If it were a neuter noun, the pattern would be different, but here it follows the common-gender pattern.

Because Swedish usually writes compound nouns as a single word.

Tidsfrist is made from:

• tid = time
• frist = respite / limit / period allowed

Together they form tidsfrist.

The s in the middle is a linking sound, often called a linking -s-. Swedish does this in many compounds, but not all of them, so it is something you gradually get used to by exposure.

It is a correct word, but it sounds a bit more formal, administrative, or bureaucratic than everyday speech.

In casual Swedish, people might often say:

• deadline
• sista dagen
• sista datum

So the sentence is grammatically fine, but the vocabulary has a slightly formal feel.

Är is the present tense of vara, which means to be.

Swedish often uses vara with time expressions to say when something is scheduled, due, or takes place. So a structure like this is normal:

• Mötet är imorgon = the meeting is tomorrow
• Sista dagen är fredag = the last day is Friday

In the same way, tidsfristen är idag uses är to connect the subject to the time expression idag.

Yes, Swedish normally follows the V2 rule, meaning the finite verb comes in the second position of the clause.

But Hallå is an interjection, and it sits outside the main clause. The actual clause is:

tidsfristen är idag

Inside that clause, är is in the normal position.

You can also move idag to the front:

• Idag är tidsfristen

If you do that, the verb still has to stay second. So you would not say:

• Idag tidsfristen är

Both idag and i dag are used, and both are accepted.

In modern Swedish, idag as one word is very common. I dag is also possible and means exactly the same thing. This is mostly a spelling/style issue, not a meaning difference.

So:

• idag
• i dag

Both are fine.

Because idag is already a complete time adverb, meaning today.

Swedish does not need a preposition here. Just as in English you say today rather than on today, Swedish says idag, not something like på idag.

This is also true for other common time words:

• igår = yesterday
• imorgon = tomorrow

The comma separates the interjection Hallå from the main sentence.

In writing, this helps show a pause:

• Hallå, tidsfristen är idag!

It makes the opening feel more like spoken language, where someone says Hallå first and then delivers the reminder. The exclamation mark adds urgency or emphasis.