De wenperiode begint bij de eerste haal- en brengtijd.

Wenperiode is a compound noun:

• wennen = to get used to / to adapt
• periode = period

So wenperiode literally means adjustment period or settling-in period.

Dutch uses compound nouns very often, much more freely than English. Instead of writing several separate words, Dutch usually combines them into one: wenperiode.

Because periode is a de-word, and in Dutch the final part of a compound usually determines the gender/article of the whole word.

• de periode
• therefore: de wenperiode

This is a very useful rule for compounds:

• de schooltijd because de tijd
• het schoolgebouw because het gebouw

Begint is the third person singular present tense of beginnen.

The subject is de wenperiode, which is singular, so Dutch uses the singular verb form:

• ik begin
• jij begint
• hij/zij/het begint
• de wenperiode begint

So this is completely normal agreement between subject and verb.

This is standard Dutch main-clause word order:

subject + finite verb + rest of the sentence

• De wenperiode = subject
• begint = finite verb
• bij de eerste haal- en brengtijd = adverbial/prepositional phrase

Dutch main clauses usually put the conjugated verb in the second position. Here the subject comes first, so the verb comes right after it.

Here bij means something like at, starting from, or when it reaches that point in the schedule/context.

So begint bij ... means the adjustment period starts at the first relevant pick-up/drop-off time.

For English speakers, bij often feels broader than English by. It can mean:

• near
• at
• with
• in connection with

In this sentence, bij is tied to the idea of the starting point in a routine or schedule.

Dutch adjectives usually take an -e ending before a noun when there is a definite article such as de or het.

So:

• de eerste tijd
• de eerste dag
• de eerste keer

Here, eerste describes haal- en brengtijd, so the -e ending is expected.

This is a shortened coordinated form. It stands for:

haaltijd en brengtijd

In English, that is something like pick-up time and drop-off time.

Dutch often avoids repeating the second part of a compound when two similar compounds are linked with en. That is what is happening here.

So:

• haal- en brengtijd = haaltijd en brengtijd

This is very common in Dutch.

The hyphen shows that part of the compound has been left out because it is understood from the second word.

So:

• haal- en brengtijd

means:

• haaltijd en brengtijd

The omitted part is tijd after haal-.

This kind of hyphen is very common in Dutch when two compounds share the same ending, for example:

• in- en uitgang = ingang en uitgang
• voor- en nadelen = voordelen en nadelen

It helps avoid repetition.

Grammatically, it refers to a paired concept: the pick-up and drop-off time(s) as part of the routine.

In real-life usage, it often points to the first moment in the usual drop-off/pick-up schedule relevant to the adjustment period. The exact practical meaning depends on context, but structurally Dutch treats it as one combined expression.

So even though it refers to two related actions, it is packaged as one coordinated noun phrase.

Yes. It comes from the verb wennen, which means to get used to.

You may also see:

• wennen aan iets = to get used to something
• een wenmoment = an adjustment moment
• een wenperiode = an adjustment period

This is a common pattern in Dutch: a verb stem or shortened form appears inside a compound noun.

Yes, that would be understandable and grammatically fine. But haal- en brengtijd is more compact and natural in administrative or institutional Dutch, especially in school or childcare contexts.

Dutch often prefers this shortened compound coordination when both parts share the same ending. It sounds efficient and idiomatic.