How to write A.M and P.M. in Spanish

Bilingual Article.

If “a.m.” and “p.m.” come from Latin “ante meridiem” and “post meridiem”, shouldn’t they follow same writing rules in English and Spanish? Well, they don’t.

Spanish grammar rules to write “ante meridiem” and “post meridiem” abbreviations differ from English grammar rules.

This is how we need to write “a.m.” and “p.m” abbreviations in Spanish:

“a. m.” & “p. m.”

-Lower case
-One space after first period

Las abreviaturas “a. m.” y “p. m.” se escriben en minúsculas, dejando un espacio después del primer punto.

As you can see, there’s only one way to write “a. m.” and “p. m.” in Spanish—with lower case, and one space after first period.

Now, let’s see some examples:

El horario de atención es de 8 a. m. a 5 p. m.
(Oración simple/Simple sentence)

Comienzan el conteo exactamente a las 8 a. m., pero no saben a qué hora terminarán de hacerlo.
(Oración compuesta/Compound sentence)

Did you notice? The second option has a comma after “a. m.” Spanish abbreviation. Why? Because it is a compound sentence, and we need a comma to add the second clause; not because you need to write a comma after the abbreviation.

Two more examples:

Puedes llamarnos de 9 a. m. a 5 p. m., de lunes a viernes.
El vuelo sale a las 5:45 p. m.

Tip:

“a. m.” & “p. m.”
-Lower case
-One space after first period

If you have a question about how to write an abbreviation in Spanish. I will be happy to help you! Send your question below.

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