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"Mes" is a noun which is often translated as "month", and "día" is a noun which is often translated as "day". Learn more about the difference between "mes" and "día" below.
el mes(
mehs
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
a. month
Octubre es mi mes favorito porque los árboles cambian de color.October is my favorite month because the trees change color.
a. monthly salary (income)
Recibo mi mes el 30 de cada mes.I get my monthly salary on the 30th of the month.
a. period
No quiere ir a nadar porque está con el mes.She doesn't want to go swimming because she has her period.
el día(
dee
-
ah
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
a. day
Estoy en el restaurante en donde comimos el otro día.I'm at the restaurant where we ate the other day.
2. (daylight)
a. day
Los que trabajan en el turno de noche tienen que dormir de día.Night workers have to sleep during the day.