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"La hora" is a form of "hora", a noun which is often translated as "hour". "De la noche" is a phrase which is often translated as "at night". Learn more about the difference between "la hora" and "de la noche" below.
la hora(
oh
-
rah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
a. time
Es hora de que se reúnan y tomen una decisión.It is time for them to meet and make a decision.
5. (meeting)
a. appointment
Mañana tengo hora con el podólogo.I have an appointment with the podiatrist tomorrow.
de la noche(
deh
lah
noh
-
cheh
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. at night
Son las once de la noche, ¿qué haces despierta?It's eleven at night. What are you doing up?
b. in the evening
Creo que empieza a las ocho de la noche pero no estoy segura.I think it starts at eight in the evening but I'm not sure.
a. of the night
Te hago el cuento de la noche en que naciste.I'll tell you the story of the night when you were born.