Tak for sidst, det var en hyggelig aften.

It is a very common fixed expression. Literally, it is something like thanks for last time, but in natural English it means thanks for the last time we met or thanks for the other day.

Danes use it after a shared event or meeting, such as:

• a dinner
• a party
• a visit
• a coffee date
• a work meeting

It is especially common when you meet the person again later, but it can also be used in a text or message afterward.

Because sidst can mean last time / most recently by itself. In this sentence, it works as a short, natural reference to the previous occasion.

So tak for sidst is just an idiomatic Danish expression. It does not need a full phrase like den sidste gang to sound complete.

Usually, no. Tak for sidst is normally said after the event, not during it or immediately as you leave.

If you are leaving at the end of the evening, you are more likely to say things like:

• Tak for i aften = thanks for this evening
• Tak for en hyggelig aften = thanks for a nice evening

Then later, when you refer back to that evening, tak for sidst becomes natural.

Tak for i går means thanks for yesterday, so it is more specific.
Tak for sidst is broader and means thanks for the last time we met.

Use:

• tak for i går if the event was yesterday
• tak for sidst if you want a more general expression, or if more time has passed

If the event was yesterday, both can work, but the nuance is slightly different.

The comma separates two parts:

1. Tak for sidst — a fixed expression or short standalone remark
2. det var en hyggelig aften — a full clause

So the comma helps show the pause between:

• Thanks for last time,
• it was a pleasant evening.

In messages and informal writing, punctuation can vary a little, but this version is perfectly natural.

Because det is often used in Danish to refer to a whole situation, event, or experience.

Here, det var en hyggelig aften means it was a nice evening. The it does not point to one specific noun in the sentence before it; it refers to the occasion as a whole.

Den would usually refer back more directly to a common-gender noun. In this sentence, det is the natural choice.

Hyggelig is one of the classic Danish words that is hard to translate with just one English word.

Depending on context, it can mean:

• cozy
• pleasant
• warm
• enjoyable
• nice in a relaxed, friendly way

In en hyggelig aften, it usually means something like:

• a lovely evening
• a really nice evening
• a pleasant, cozy evening

So it is not only about physical coziness. It also describes the atmosphere and company.

Because aften is a common-gender noun in Danish:

• en aften

With a singular common-gender noun, the adjective stays in its basic form:

• en hyggelig aften

If the noun were neuter (et-word), the adjective would normally take -t:

• et hyggeligt sted = a cozy place

So the form depends on the gender of the noun.

It is polite, natural, and fairly neutral. It is not stiff or overly formal, but it is also not slangy.

You can use it with:

• friends
• family
• neighbors
• colleagues
• hosts

So it works in many everyday situations.

You can definitely use it in writing too. It sounds very natural in:

• text messages
• emails
• chat messages

For example, after a dinner or party, a Dane might write exactly this to the host. It is a normal and friendly thing to send.