Lhůta skončí zítra.

Because skončit is a perfective verb. In Czech, perfective verbs do not normally have a true present tense for present-time actions. Their “present” forms usually refer to the future.

So:

• skončí = will end
• not ends right now

Compare:

• končí (from imperfective končit) = is ending / ends
• skončí (from perfective skončit) = will end / will be over

That is one of the most important verb patterns in Czech.

Not quite. Lhůta usually means a time limit, deadline period, or allowed period of time for doing something. It is common in formal, legal, administrative, and business language.

For example, lhůta can be:

• a deadline for submitting documents
• a period for paying a fine
• a statutory time limit

Termín is broader and often means:

• a date
• an appointment
• a scheduled time
• a deadline in a more general sense

So lhůta skončí zítra suggests something like the time limit expires tomorrow or the deadline period ends tomorrow, often in a formal context.

This word is tricky for English speakers because of the beginning lh.

A rough guide:

• lhůta ≈ LHOO-tah

A few details:

• l is a clear l
• h is pronounced, not silent
• ů sounds like a long oo as in food
• stress in Czech is normally on the first syllable, so: LHŮ-ta

The hardest part is the cluster lh at the start. Czech allows consonant groups that feel unusual in English. You may hear learners simplify it at first, but ideally both sounds should be there.

It is in the nominative singular because it is the subject of the sentence.

Structure:

• Lhůta = subject
• skončí = verb
• zítra = adverb of time

The basic idea is: The time limit will end tomorrow.

The dictionary form is also lhůta, so what you see here is the base singular form.

Czech has no articles like English a/an/the. That means Czech usually expresses definiteness from:

• context
• word order
• general meaning
• situation

So Lhůta skončí zítra can naturally mean:

• The deadline ends tomorrow
• The time limit will expire tomorrow

English needs an article, but Czech does not.

Yes. Czech word order is relatively flexible, and Zítra skončí lhůta is also correct.

All of these are possible, with slightly different emphasis:

• Lhůta skončí zítra. → neutral, starting with the subject
• Zítra skončí lhůta. → emphasizes tomorrow
• Lhůta zítra skončí. → also possible, often a bit more marked or stylistic

In Czech, word order often reflects information structure rather than strict grammatical necessity.

Because zítra is an adverb, meaning tomorrow. It works on its own, just like English tomorrow.

So:

• zítra = tomorrow
• not v zítra or anything similar

Other common Czech time adverbs work the same way:

• dnes = today
• včera = yesterday
• brzy = soon

Yes, that is also possible, but the aspect changes the nuance.

• Lhůta skončí zítra.
  Perfective: focuses on the action being completed; very natural for will end / will expire tomorrow.

• Lhůta končí zítra.
  Imperfective: can mean is ending tomorrow or ends tomorrow; also natural, especially in everyday speech.

In many real situations, both may be used, but skončí often sounds a bit more clearly like a single completed endpoint.

Yes. The subject lhůta is:

• singular
• feminine
• third person

So the verb agrees with it in number and person, giving skončí.

In the future/present form of this perfective verb, skončí can mean:

• he/she/it will end
• it ends in certain grammatical descriptions, but in practice with a perfective verb it usually refers to the future

Here the subject is an inanimate feminine noun, so in English we translate it as it will end or more naturally the deadline will end / expire.

You could, but it would mean something different or sound less natural here.

• skončí = will end / will be over
  A simple future endpoint.

• bude končit = will be ending
  More like an ongoing future process, or a future action viewed as in progress.

For a deadline or time limit reaching its endpoint, Czech usually prefers the simpler perfective future:

• Lhůta skončí zítra.

That is the most straightforward way to say it.