Den här stunden med familjen känns viktig.

Because Swedish often uses double definiteness with words like den här and den där.

So you get:

• den här stunden = this moment
• not den här stund

The noun stund becomes definite as stunden, even though den här already points it out. This is normal Swedish grammar.

A useful pattern is:

• den här + definite singular common-gender noun
• det här + definite singular neuter noun
• de här + definite plural noun

Examples:

• den här boken = this book
• det här huset = this house
• de här dagarna = these days

Because stund is a common gender noun in Swedish, not a neuter noun.

• en stund
• therefore: den här stunden

If the noun were neuter, you would use det här instead:

• ett ögonblick
• det här ögonblicket = this moment

So the choice between den and det depends on the noun’s grammatical gender.

Här means here, but in the expression den här / det här / de här, it works like English this / these.

So:

• den här stunden = this moment
• literally something like the here moment

In modern Swedish, den här is one of the most common ways to say this before a noun.

You may also see denna stund, which is more formal or literary.

Because med familjen means with the family, and Swedish often uses the definite form where English might use a possessive or a more general phrase.

So:

• familj = family
• familjen = the family

In context, med familjen often naturally means something like with the family or with my/our family, depending on the situation.

Compare:

• med familj can sound more abstract, like with family as a concept
• med familjen refers to a specific family group

In this sentence, the speaker is probably talking about their own family or a specific family gathering.

Here känns means feels.

So:

• Den här stunden med familjen känns viktig.
• This moment with the family feels important.

The verb comes from känna, which often means to feel or to know by touch/sense.

A very common pattern is:

• något känns + adjective
• something feels + adjective

Examples:

• Det känns bra. = It feels good.
• Filmen känns lång. = The movie feels long.
• Det här känns rätt. = This feels right.

That -s form is normal for this verb in this kind of meaning.

The base verb is känna, but when Swedish says that something feels a certain way, it often uses kännas:

• Det känns bra.
• Hon känns trött.
• Stunden känns viktig.

So you can think of:

• känna = to feel, to know, to touch
• kännas = to feel, to seem, to come across as

In this sentence, känns is the present tense of kännas.

Because viktig has to agree with stunden, and stunden is a singular common gender noun.

Agreement pattern:

• en-word singular: viktig
• ett-word singular: viktigt
• plural: viktiga

So:

• en stund → stunden känns viktig
• ett ögonblick → ögonblicket känns viktigt
• stunderna känns viktiga → the moments feel important

Since stund is an en-word, viktig is correct.

It is a predicative adjective, which means it comes after the verb and describes the subject.

So in:

• Den här stunden med familjen känns viktig

the subject is:

• Den här stunden med familjen

and viktig tells us what that subject feels like.

This is similar to English:

• The moment feels important
• The food tastes good
• She seems tired

In all of these, the adjective comes after the verb and describes the subject.

Because Swedish main clauses usually follow the V2 rule, meaning the finite verb comes in the second position.

Here the first element is the whole subject:

• Den här stunden med familjen

Then comes the finite verb:

• känns

Then the adjective:

• viktig

So the structure is:

• [Subject] + [verb] + [predicative adjective]

This is the normal order for a statement.

Yes, you could. It is grammatical.

• Den här stunden med familjen känns viktig = natural, everyday
• Denna stund med familjen känns viktig = more formal, written, or literary

Both mean basically the same thing, but den här is usually what you hear in normal spoken Swedish.

This is an important nuance.

• är viktig = is important
• känns viktig = feels important

är viktig sounds more direct and objective. känns viktig is more personal, emotional, or impression-based.

Compare:

• Den här stunden med familjen är viktig.
  = This moment with the family is important.

• Den här stunden med familjen känns viktig.
  = This moment with the family feels important.

The second version suggests the speaker is experiencing it as meaningful right now.

Literally it means with the family, but in real use it often means with my family, with our family, or with the family depending on context.

Swedish often leaves that kind of ownership to context when it is obvious.

So if someone is talking about their own life, med familjen will very often be understood as with my/the family.

A fairly close breakdown is:

• Den här = this
• stunden = moment / time / while
• med familjen = with the family
• känns = feels
• viktig = important

So, very literally:

• This moment with the family feels important.

That is also a good natural English translation, so the Swedish structure matches English quite nicely here.