Learn Hardcore Czech: Moje babička má nejvíc ráda dny, kdy je celá rodina doma. - My grandmother likes the days when the whole family is at home the most.

Moje babička má ráda dny… = My grandmother has-fond days… = She likes days…
If you said only Moje babička ráda dny, it would be incorrect; you need the verb mít here.

The ráda part changes with the gender/number of the subject:

Můj dědeček má rád dny… (grandfather – masculine)
Moje babička má ráda dny… (grandmother – feminine)
Moje děti mají rády / rádi dny… (children – mixed usage, often rády for neuter plural or children, rádi when emphasizing people)

What exactly does nejvíc ráda mean?

Nejvíc means the most. So nejvíc ráda literally means “most fond (of)” or “likes the most.”

Structure:

ráda = likes, is fond of
víc ráda = likes more (comparative)
nejvíc ráda = likes the most (superlative)

So má nejvíc ráda dny, kdy… = “she likes best / she likes the most the days when…”

Is there a difference between nejvíc ráda and nejraději?

They mean almost the same thing: “the most / best (of all).”

Moje babička má nejvíc ráda dny, kdy…
Moje babička má nejraději dny, kdy…

Both are correct.

Nuance:

nejraději is a single adverb and is very common and natural.
nejvíc ráda is a bit more colloquial and emphasizes the “most” part with nejvíc.

In everyday speech you will hear both, but learners are often taught mít nejraději first:

Mám nejraději čokoládu. – I like chocolate the most / Chocolate is my favourite.

Why is it ráda and not rád?

Because rád/ráda/rádo agrees with the gender and number of the person who likes something.

Subject: babička (grandmother)

babička is feminine singular
so we must use the feminine singular form ráda

Compare:

Můj bratr má rád čaj. (bratr = masculine → rád)
Moje sestra má ráda čaj. (sestra = feminine → ráda)
Moje dítě má rádo čaj. (dítě = neuter → rádo)
Moji rodiče mají rádi čaj. (rodiče = plural people → rádi)

So: Moje babička má nejvíc ráda… is grammatically required because babička is feminine.

What case is dny, and why do we use that form?

Dny is the accusative plural of den (day).

We use the accusative because dny is the direct object of the verb phrase mít rád:

(Kdo?) Moje babička – subject (nominative)
(Koho? Co?) dny – object (accusative)

Pattern:
Nominative subject + mít rád + accusative object
→ Moje babička má nejvíc ráda dny…

Why is it je celá rodina doma and not jsou? Isn’t “family” many people?

In Czech, rodina is grammatically singular feminine, even though it refers to a group.

So:

rodina je – the family is
celá rodina je doma – the whole family is at home

The verb agrees with grammatical number, not with the logical number of people:

Ta rodina je velká. – That family is big.
Moje rodina je v Praze. – My family is in Prague.

If you wanted a plural verb, you would have to use a plural noun:

všichni (everybody): Všichni jsou doma. – Everyone is at home.
členové rodiny (family members): Členové rodiny jsou doma.

Why is it celá rodina, not celou rodinu?

Because celá rodina is the subject of the verb je in the clause kdy je celá rodina doma.

As the subject, rodina is in the nominative case, and celá must agree:

nominative feminine singular: celá rodina
accusative feminine singular: celou rodinu

We would use celou rodinu only if it were an object:

Vidím celou rodinu. – I see the whole family.
Má rád celou rodinu. – He likes the whole family.

But here the structure is:

kdy (je) celá rodina (kde?) doma
Subject = celá rodina → nominative → celá, not celou.

Why is there a comma before kdy?

Because kdy je celá rodina doma is a subordinate clause (a relative clause) that describes dny.

Czech almost always separates subordinate clauses with a comma.

Structure:

Main clause: Moje babička má nejvíc ráda dny
Subordinate (relative) clause: kdy je celá rodina doma

So you write:

Moje babička má nejvíc ráda dny, kdy je celá rodina doma.

Why is it kdy je celá rodina doma and not když je celá rodina doma?

Here kdy works like a relative word, referring back to dny:

dny, kdy… = “the days when…”

In standard Czech:

kdy is used after a specific time word: den, hodina, doba, chvíle, etc.
- den, kdy jsme se poznali – the day when we met
když is more like “when/whenever” introducing a general time clause, not directly tied to a preceding noun:
- Když je celá rodina doma, babička je šťastná. – When the whole family is at home, Grandma is happy.

So:

dny, kdy je celá rodina doma – correct, standard
dny, když je celá rodina doma – sounds wrong / non‑standard in written Czech.

Could I change the word order to Moje babička má ráda nejvíc dny, kdy…?

You can say má nejvíc ráda dny or má dny nejvíc ráda or má ráda nejvíc dny, and they are all understandable, but they differ in naturalness and emphasis.

Most natural here:

Moje babička má nejvíc ráda dny, kdy…

Other orders:

Moje babička má ráda nejvíc dny, kdy…
– Understandable, but the rhythm is a bit awkward; most natives would still prefer the original.
Moje babička má dny nejvíc ráda, když…
– Possible in a different sentence, but again less smooth.

Default, neutral emphasis is usually with nejvíc before ráda and the object after:

má nejvíc ráda + [object]

Why is it doma and not domu or v domě?

Czech distinguishes location vs movement:

kde? (where? location) → use doma = at home
kam? (where to? direction) → use domů = (to) home

Examples:

Jsem doma. – I am at home. (location)
Jdu domů. – I am going home. (motion)

In the sentence, we talk about being at home, so we need the location form:

kdy je celá rodina doma – when the whole family is at home

You could also say kdy je celá rodina v domě, but that sounds more like “in the building/house” (physically inside a house) and is less idiomatic when you just mean “at home” as a state.

Why is it Moje babička and not the shorter form Má babička?

Both moje babička and má babička are correct; they are just two forms of the same possessive pronoun.

moje = full form
má = short form

With feminine singular nouns like babička, moje is more common and neutral in modern Czech, especially in spoken language:

Moje babička má nejvíc ráda… – very natural
Má babička má nejvíc ráda… – correct, but sounds a bit more formal or “written” style.

Both are fine; as a learner, using moje/moja‑type full forms is safest and most common in speech.

Could I omit moje and just say Babička má nejvíc ráda dny, kdy…?

Yes. In context, Babička often means “(my/our) grandma” if it is clear who is speaking.

In a family conversation, Babička má nejvíc ráda dny, kdy… will be understood as “Grandma likes best the days when…” (our family’s grandma).

However:

Moje babička is explicit and is good when you talk to people outside your family or when you first introduce her.
Just Babička sounds more familiar, like family‑internal talk or storytelling.

So both are correct; the difference is mostly pragmatic (who you are talking to and how personal/familiar the tone is).