Die Uhrzeit stimmt nicht.

Uhrzeit specifically means the time as in the current time shown on a clock or stated aloud, for example 3:15.

Uhr usually means clock, watch, or o’clock depending on context.

So:

• Die Uhrzeit stimmt nicht. = The time is not correct.
• Die Uhr stimmt nicht. can sound more like The clock/watch is wrong.

Using Uhrzeit makes it very clear that the problem is the time reading itself.

Die is the definite article for the noun Uhrzeit.

Uhrzeit is a feminine noun, so in the nominative singular it takes die:

• die Uhrzeit

In this sentence, die Uhrzeit is the subject, so the nominative form is used.

The verb stimmen often means to be correct, to be right, or to be accurate.

So Die Uhrzeit stimmt nicht is a very natural way to say that the time is wrong or inaccurate.

German often uses stimmen in situations where English might use:

• is right / is correct
• checks out
• matches
• is accurate

Examples:

• Das stimmt. = That’s correct.
• Das stimmt nicht. = That’s not correct.
• Die Adresse stimmt nicht. = The address is wrong.
• Die Rechnung stimmt nicht. = The bill / calculation is incorrect.

Because the subject is die Uhrzeit, which is third person singular.

The verb stimmen is conjugated like this in the present tense:

• ich stimme
• du stimmst
• er/sie/es stimmt
• wir stimmen
• ihr stimmt
• sie/Sie stimmen

Since die Uhrzeit is grammatically like sie for a singular feminine noun, the correct form is stimmt.

In a simple main clause, nicht often comes after the part it negates or near the end of the sentence, especially when it negates the whole statement.

Here, nicht negates the idea that the time stimmt:

• Die Uhrzeit stimmt nicht.

That word order is completely normal and idiomatic.

A learner may want to compare:

• Das stimmt nicht.
• Er kommt nicht.
• Die Uhrzeit stimmt nicht.

In all of these, nicht comes late in the sentence.

Yes. Die Uhrzeit ist nicht richtig is understandable and grammatical.

But Die Uhrzeit stimmt nicht is often more natural in everyday German when something is factually wrong or inaccurate.

Very roughly:

• stimmt nicht = is not correct / doesn’t match reality
• ist nicht richtig = is not right / not correct

Both work, but stimmt nicht is especially common in this kind of context.

In this sentence, stimmen means something like:

• to be correct
• to be accurate
• to match
• to be in order

It does not mean to vote here, even though stimmen can have other meanings in other contexts.

German verbs often have several related meanings depending on context, and this is a very common one.

Usually, yes. It most naturally suggests that the displayed or stated time is incorrect.

Depending on context, it could mean:

• a clock is showing the wrong time
• someone gave the wrong time
• the time in a schedule or system is inaccurate

So the sentence is about the time value being wrong, not necessarily about the physical clock being broken.

A rough guide for an English speaker:

• Uhrzeit ≈ OOR-tsite
• stimmt ≈ shtimt
• nicht ≈ depends on accent, but roughly nikht with a soft ch sound

A few details:

• Uhr has a long oo sound.
• z in German sounds like ts.
• st at the beginning of stimmt is pronounced sht.
• The ch in nicht is the soft sound also heard in ich.

Not in normal standard German. You generally need the article here:

• Die Uhrzeit stimmt nicht.

Leaving out the article would sound incomplete or unnatural in this sentence.

German uses articles more often than English does, so learners often need to remember that a noun like Uhrzeit usually does not stand alone in a basic sentence like this.

It is singular.

You can tell from two things:

• the article is die for feminine singular
• the verb is stimmt, which is singular

The plural would be die Uhrzeiten, but that would mean times in a different sense, and it would need a plural verb:

• Die Uhrzeiten stimmen nicht.

That would mean multiple stated times are incorrect.