Is "all day Saturday" tout jou Samdi?

No.
All day Saturday.
Tout jounen samdi a.

Jodi

jodi (usually jodi a) → today.

Jounen jodi (or jounen jodi a) → this present day

Ask me anything

my day is going very well! You?

Wi. Depi nou pa lopital, tout bagay anfòm!

My day is going very well. And you?
Jounen m ap pase byen. E ou menm?
Jounen mwen trè byen.  E ou menm?

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how was you day?

How was your day?

Kouman jounen w te ye?

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jounen jodi a

jounen jodi a - today, on this day

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HOW TO SAY ALL DAY

day → jou
today → jodi a
all day → tout la jounen
every day → chak jou

during the day
all day long
pandan jounen an

How's your day?

Kijan jounen ou ye?

How was your day?

Kijan jounen ou te ye?

I had a bad day.

Mwen pase yon move jounen.

I had a good day.

Mwen pase yon bon jounen.

What's today?

What day is today?

Ki jou jodi a ye?

This present day
Jounen jodi a

jou vs. jounen

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The words 'jou' and 'joune' seem to have the same meaning, but different uses. Can you clarify this?

They practically carry the same meaning.

jou - the day
jounen - the (duration of the) day

Examples:
Have a great day. - Pase yon bon jounen.

I had a bad day. - M te pase yon move jounen.

On what day are you coming?  - Ki jou wap vini?

Today is the first day of the year. -Jodi a se premye jou mwa a.

Today is the last day of the year. - Jodi a se dènye jou ane a.

She cried all day. - Li te kriye tout la jounen.

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