How to Say "at night" in Spanish
The Spanish word for “at night” is “pm” — A1 level. This is a very common word in everyday Spanish.

Examples
La película empieza a las 8 pm.
The movie starts at 8 p.m.
Mi clase termina a las 2 pm.
My class finishes at 2 p.m.
Llego a casa a las 6:30 pm.
I get home at 6:30 p.m.
Writing Style
While people often write 'pm' or 'PM' casually, the official academic way in Spanish is to write it with lowercase letters and spaces: 'p. m.'
Speaking vs. Writing
In writing, we use 'pm,' but when speaking, Spanish speakers usually say 'de la tarde' (for afternoon) or 'de la noche' (for night) instead of saying the letters 'p. m.'
Using 'en' instead of 'de'
Mistake: “Son las cuatro en la tarde.”
Correction: Son las cuatro de la tarde (or 4 pm). When telling a specific time, use 'de' to link the hour to the time of day.
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