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"Son las once" is a phrase which is often translated as "it's eleven o'clock", and "treinta" is a noun which is often translated as "thirty". Learn more about the difference between "son las once" and "treinta" below.
son las once(
sohn
lahs
ohn
-
seh
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. it's eleven o'clock
Son las once. La reunión empieza dentro de media hora.It's eleven o'clock. The meeting will start in half an hour.
el treinta(
treyn
-
tah
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
2. (number)
b. thirtieth (in dates)
El cumpleaños de mi padre es el treinta de noviembre.My father’s birthday is on the thirtieth of November.