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"Treinta" is a noun which is often translated as "thirty", and "son las dos" is a phrase which is often translated as "it's two o'clock". Learn more about the difference between "treinta" and "son las dos" below.
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.
son las dos(
sohn
lahs
dohs
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. it's two o'clock
¡Ya son las dos y todavía no he empezado a hacer la comida!It's two o'clock already, and I haven't started making lunch yet!