(the) last / (the) next

[Magg]

Hello,

I´d like you to help me get to know when using the article or not. Rules?
Is there a difference in meaning?

Last Saturday / The last Saturday

Cheers,
Magg

[Casiopea]

"the" expresses specifics, so

EX: I'll see you the last Saturday of the month.

The the adjectives "last" and "next" also specify:

EX: We met last Saturday and we're going to meet next Saturday, too.

[M56]

"the" expresses specifics, so

EX: I'll see you the last Saturday of the month.

The the adjectives "last" and "next" also specify:

EX: We met last Saturday and we're going to meet next Saturday, too.

<The the adjectives "last" and "next" also specify:>

Why two uses of "the" there?