Lad os gøre det i weekenden.

Lad os is the standard Danish way to say let’s ... when making a suggestion.

Grammatically, it is:

• lad = imperative form of lade (to let)
• os = us

So literally it is let us, but in normal modern Danish it works just like English let’s:

• Lad os gå. = Let’s go.
• Lad os spise. = Let’s eat.

It is a very common and natural expression.

Because after lad os, Danish normally uses the infinitive form of the verb.

So:

• gøre = infinitive, to do
• gør = imperative or present-tense form, depending on context

After lad os, you want:

• Lad os gøre det = Let’s do it

Not:

• Lad os gør det ❌

You can think of it as similar to English let us do it, where do is the base form.

Because after lade in this kind of construction, Danish does not use at.

So you say:

• Lad os gøre det ✔

Not:

• Lad os at gøre det ❌

This is important, because learners often expect an infinitive marker like English to, but Danish often leaves at out after certain verbs and structures.

Det means it, and it refers to whatever action, task, or plan is already understood from the context.

For example:

• Skal vi male væggen? Lad os gøre det i weekenden. = Shall we paint the wall? Let’s do it on the weekend.

In Danish, det is very often used for:

• an action
• an idea
• a plan
• something already mentioned

So even if the noun itself is not neuter, det is often used to refer to the whole situation or action.

In Danish, i is the normal preposition here when talking about doing something during the weekend.

So:

• i weekenden = in/during the weekend, which often corresponds to English on the weekend or at the weekend

This is one of those places where Danish and English use different prepositions. Even if English says on, Danish usually says i.

Because Danish often adds the definite article as an ending.

• en weekend = a weekend
• weekenden = the weekend

So i weekenden literally means in the weekend / during the weekend, but in natural English you would usually translate it as on the weekend or this weekend, depending on context.

This definite ending is very common in Danish:

• en bil → bilen
• en dag → dagen
• en weekend → weekenden

Yes, but it usually means something a bit different.

• i weekenden usually refers to this weekend / the weekend in question
• om weekenden often means on weekends / at the weekend generally / during the weekend period

Compare:

• Lad os gøre det i weekenden.
  = Let’s do it this weekend / over the weekend
• Jeg arbejder om weekenden.
  = I work on weekends / at the weekend

So in your sentence, i weekenden is the most natural choice.

Yes, absolutely. Lad os ... is a very normal, everyday way to suggest doing something together.

It sounds:

• natural
• friendly
• cooperative

For example:

• Lad os tage af sted nu. = Let’s leave now.
• Lad os snakke senere. = Let’s talk later.
• Lad os gøre det i weekenden. = Let’s do it this weekend.

It is not old-fashioned or overly formal.

Yes, but the version you have is the most neutral and straightforward.

The basic order here is:

• Lad os
  • verb + object + time phrase

So:

• Lad os gøre det i weekenden.

You can move the time phrase in some contexts, but then the sentence structure changes:

• I weekenden, lad os gøre det is not the normal everyday choice here.
• A more natural alternative would be something like Lad os gøre det i weekenden or Lad os i stedet gøre det i weekenden, depending on emphasis.

For a learner, the safest pattern is:

• Lad os + infinitive + object + time expression

In normal speech, Lad os is often pronounced more smoothly than the spelling suggests.

A learner should know two things:

• the d in lad is very soft in Danish
• os is often reduced in quick speech

So it may sound closer to something like:

• la os

That does not mean the spelling changes. It is still written Lad os, but the pronunciation is softer and more connected than an English speaker might expect.