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"Treinta" is a noun which is often translated as "thirty", and "son las seis" is a phrase which is often translated as "it's six o clock". Learn more about the difference between "treinta" and "son las seis" 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 seis(
sohn
lahs
seys
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. it's six o clock
Son las seis de la mañana. ¡Hora de levantarse!It's six o'clock in the morning. It's time to get up!