Días de la semana, meses y números (Days of the week, months and numbers)

Días de la semana - Days of the week

In Spanish-speaking countries, the week begins on Monday. Notice that the days of the week are not capitalized.

lunes (Monday)
martes (Tuesday)
miércoles (Wednesday)
jueves (Thursday)
viernes (Friday)
sábado (Saturday)
domingo (Sunday)

All days of the week are masculine

No trabajo el lunes (I don't work on Monday)
No trabajo los martes (I don't work on Tuesdays)
Hay una fiesta el jueves (There is a oarty on Wednesday)
Hay muchas fiestas los viernes (There are many parties on Fridays)

Days of the week ending with -s do not change form in the plural, only article change.

el lunes - los lunes
el jueves - los jueves
el domingo - los domingos (add -s)
el sábado - los sábados (add -s)

Use the verb ser to express the day. "es" is a conjugation of that verb.

¿Qué día es hoy? (What day is today)
Hoy es martes? (Today is Tuesday)
Mañana es lunes? (Tomorrow is Monday)

Meses del año - Months of the year

enero (January)

febrero (February)

marzo (March)

abril (April)

mayo (May)

junio (June)

julio (July)

agosto (August)

septiembre (September)

octubre (October)

noviembre (November)

diciembre (December)

To express "in a certain month" use the preposition "en"

Vamos a México en enero (We are going to México in January)

Números - Numbers

1. uno

2. dos

3. tres

4. cuatro

5. cinco

6. seis

7. siete

8. ocho

9. nueve

10. diez

The number "uno" change to "un" before a masculine noun

un cuaderno (one notebook)

un perro (one dog)

un chico (one boy)

The number "uno" change to "unq" before a feminine noun

una chica (one girl)

una cadera (one chair)