Oppfølgingstimen og etterkontrollen er neste uke.

Because Norwegian normally writes compound nouns as one single word.

So:

• oppfølging + time = oppfølgingstime
• etter + kontroll = etterkontroll

This is very common in Norwegian. Where English often uses two words or a hyphen, Norwegian usually prefers one compound word.

Also, when a compound becomes definite, the definite ending goes on the last part:

• oppfølgingstime → oppfølgingstimen
• etterkontroll → etterkontrollen

The ending -en is the definite article attached to the noun. In English, this is often translated as the.

So instead of putting a separate word before the noun, Norwegian often adds the definiteness to the end:

• en kontroll = a check / an examination
• kontrollen = the check / the examination

The same pattern is happening in both nouns here.

Yes, time can mean hour, lesson, or appointment/session, depending on context.

In medical or practical contexts, time often means an appointment. So oppfølgingstimen is not talking about a literal clock hour here, but about a scheduled follow-up appointment.

This is something English speakers just have to get used to: Norwegian time has a wider range than English time.

They are similar, but they are not exactly the same.

• oppfølgingstime suggests a follow-up appointment/session
• etterkontroll suggests a follow-up check/check-up/examination after something

So oppfølgingstime focuses more on the appointment itself, while etterkontroll focuses more on the checking/reviewing aspect.

In real life, the exact difference depends on context, especially in healthcare.

Because er is the present tense of å være (to be), and Norwegian verbs do not change form for singular and plural subjects.

Compare:

• Timen er neste uke.
• Timen og kontrollen er neste uke.

The verb stays er in both cases.

So even though the subject is logically plural, Norwegian does not need a special plural form like English are.

Because Norwegian usually uses no preposition with common time expressions like this.

So you say:

• neste uke = next week
• neste måned = next month
• neste år = next year

Using i here would usually sound unnatural in standard Norwegian for this meaning.

In this kind of time expression, Norwegian usually uses the bare noun after neste:

• neste uke
• neste måned
• neste år

That is the normal standard pattern for saying next week / next month / next year.

You may hear forms like neste uka or neste uken in some dialects or styles, but neste uke is the safest standard form to learn.

It could definitely come first.

The sentence as written has the normal order:

• Oppfølgingstimen og etterkontrollen er neste uke.

But you can also front the time expression:

• Neste uke er oppfølgingstimen og etterkontrollen.

That is still correct Norwegian. When something other than the subject comes first, the verb still stays in second position, which is a very important Norwegian word-order rule.

Each noun is singular by itself:

• oppfølgingstimen = one follow-up appointment
• etterkontrollen = one follow-up check-up

But together, joined by og (and), they make a compound subject referring to two separate things.

So the meaning is plural overall, even though each noun is singular in form.