Spanish carves up time expressions with three different prepositions — en, a, and por — plus a fourth option that takes no preposition at all, just the article el. Months take en. Clock times take a. Parts of the day take por. Specific days of the week or dates take el. Mixing them up is one of the most reliable A1 tells, and English speakers do it constantly because English uses in, at, and on in patterns that don't map cleanly onto Spanish.
This page is about the en-bucket: months, years, seasons, decades, centuries, holidays, and "in five minutes" duration. The other buckets are covered briefly at the end so you can see the contrast.
En for months, years, seasons
The core rule is simple: anything that's a broad chunk of time rather than a specific point or day takes en.
Months
En enero hace mucho frío en Madrid; conviene llevar abrigo.
In January it's very cold in Madrid; you should bring a coat.
Mi cumpleaños es en abril, el día doce.
My birthday is in April, the twelfth.
Nos casamos en septiembre del año pasado.
We got married in September last year.
Notice how the specific day — el día doce — uses el, not en. This is the pattern: the month gets en, the day gets el. We'll come back to this.
Years
Empecé a trabajar aquí en 2019, justo antes de la pandemia.
I started working here in 2019, right before the pandemic.
En el año dos mil cumplí dieciocho años.
In the year two thousand I turned eighteen.
You can say en 2019 or, more formally, en el año 2019. Both are correct; the longer form is more common in writing and in spoken Spanish when the year matters in itself.
Seasons
Seasons take en with no article in everyday Spanish.
| Season | Phrase |
|---|---|
| spring | en primavera |
| summer | en verano |
| autumn / fall | en otoño |
| winter | en invierno |
En verano nos vamos siempre a la playa con los niños.
In summer we always go to the beach with the kids.
En invierno se vive de maravilla en el sur de España.
In winter, living in southern Spain is wonderful.
You will hear en la primavera and en el verano — they're not wrong — but the bare form is more idiomatic in Spain.
Decades and centuries
En los años ochenta la música era otra cosa.
In the eighties, music was something else.
En el siglo XX España vivió una guerra civil y una larga dictadura.
In the twentieth century, Spain went through a civil war and a long dictatorship.
Decades are usually plural: en los ochenta, en los noventa, en los dos mil. Centuries are always en el siglo X, written with Roman numerals.
En for "within / after" a duration
A second job of en is to package a duration before something happens — the English "in five minutes" / "within an hour" meaning.
En cinco minutos terminamos y nos vamos a comer.
In five minutes we'll be done and we'll head to lunch.
El paquete llega en dos o tres días laborables.
The package arrives in two or three working days.
Aprendió francés en seis meses, una barbaridad.
He learned French in six months — incredible.
This en is genuinely "within / over the span of," not a fixed clock point. En cinco minutos doesn't pin the action to a specific moment; it says it'll happen within the next five minutes or over the course of five minutes, depending on the verb.
Specific days take el, not en
This is where English speakers stumble the hardest. In English, you say on Monday, on the 5th of May. In Spanish, days and dates take the article el — no preposition at all.
| English | Spanish |
|---|---|
| on Monday | el lunes |
| on the 5th of May | el 5 de mayo |
| on 23 February 1981 | el 23 de febrero de 1981 |
| on weekends | los fines de semana |
El lunes tengo cita con el médico a las nueve.
On Monday I have a doctor's appointment at nine.
El 23 de febrero de 1981 hubo un intento de golpe de Estado.
On 23 February 1981 there was an attempted coup.
Los sábados solemos quedar con los amigos para tomar algo.
On Saturdays we usually meet up with friends for a drink.
Saying ❌en lunes or ❌en el 5 de mayo is one of the clearest signs of a beginner whose ear hasn't yet adjusted. The article el is doing the preposition's job here — it both points to the specific day and embeds the temporal meaning ("on").
Por for parts of the day
Spanish marks morning, afternoon, evening, night with por, not en.
| Part of day | Phrase |
|---|---|
| in the morning | por la mañana |
| in the afternoon | por la tarde |
| at night | por la noche |
| at midday | al mediodía |
Por la mañana voy al gimnasio; por la tarde trabajo desde casa.
In the morning I go to the gym; in the afternoon I work from home.
No puedo dormir por la noche, llevo una semana así.
I can't sleep at night — I've been like this for a week.
When you combine a part of the day with a specific clock time, you switch to de: a las ocho de la mañana (at eight in the morning), a las cinco de la tarde (at five in the afternoon).
Quedamos a las nueve de la noche en el bar de siempre.
We're meeting at nine at night at the usual bar.
A for clock times
Clock times take a — always.
La reunión es a las diez en punto, no llegues tarde.
The meeting is at ten sharp — don't be late.
Comemos a las dos y media, como buenos españoles.
We have lunch at half past two, like proper Spaniards.
Detailed coverage of clock times lives on the A para tiempo page; the point here is just to keep them out of the en bucket.
Holidays and festivals
Holidays, festive periods, and personal events take en because they behave like seasons — broad chunks of time.
En Navidad siempre vamos al pueblo a ver a mis abuelos.
At Christmas we always go to the village to see my grandparents.
En Semana Santa hay procesiones impresionantes en Sevilla.
During Holy Week there are impressive processions in Seville.
En mi cumpleaños quiero ir a cenar a un japonés.
On my birthday I want to go for Japanese food.
The last one is worth noting: even though cumpleaños is technically a single day, Spanish treats it as a "festive period" and uses en, not el. El día de mi cumpleaños would be the more day-specific alternative. The same goes for en mi santo (on my saint's day), en Año Nuevo (at New Year).
Point-in-time idioms with en
A handful of fixed phrases use en to mark a specific moment or phase.
| Phrase | Meaning |
|---|---|
| en este momento | at this moment / right now |
| en aquel entonces | back then / at that time |
| en aquella época | in those days |
| en su día | at the time / in its day |
| en breve | shortly / soon |
| en seguida | right away |
En aquel entonces no había móviles ni internet en casa.
Back then there were no mobile phones or home internet.
En seguida vuelvo, voy a por el pan.
I'll be right back — I'm just going to get the bread.
The full time-preposition cheat sheet
| Time expression | Preposition | Example |
|---|---|---|
| Month | en | en abril |
| Year | en | en 2024 |
| Season | en | en verano |
| Decade / century | en | en los ochenta |
| "In X minutes" (duration) | en | en cinco minutos |
| Holiday / festive period | en | en Navidad |
| Clock time | a | a las ocho |
| Part of day | por | por la mañana |
| Day of week | el (no prep) | el lunes |
| Specific date | el (no prep) | el 5 de mayo |
This table is worth memorising as a unit. Once it's automatic, most time-preposition errors disappear.
Common Mistakes
❌ En lunes tengo cita con el médico.
Wrong — days of the week take el, not en. (English 'on Monday' is not Spanish 'en'.)
✅ El lunes tengo cita con el médico.
On Monday I have a doctor's appointment.
❌ Por enero hace mucho frío.
Wrong — months take en, not por. (Por is for parts of the day.)
✅ En enero hace mucho frío.
In January it's very cold.
❌ En las ocho quedamos en mi casa.
Wrong — clock times take a, not en.
✅ A las ocho quedamos en mi casa.
We're meeting at my place at eight.
❌ En la mañana voy al gimnasio.
Latin American — in peninsular Spanish, parts of the day take por la mañana, not en la mañana.
✅ Por la mañana voy al gimnasio.
In the morning I go to the gym.
❌ En el 23 de febrero hubo un intento de golpe.
Wrong — specific dates take el, no preposition.
✅ El 23 de febrero hubo un intento de golpe.
On 23 February there was an attempted coup.
Key takeaways
- En is for broad chunks of time: months, years, seasons, decades, centuries, holidays, "within X minutes."
- A is for clock times: a las ocho, a las cinco y media.
- Por is for parts of the day: por la mañana, por la tarde, por la noche.
- El (with no preposition) is for specific days and dates: el lunes, el 5 de mayo.
- English "in/at/on" don't map onto Spanish prepositions — learn the Spanish time categories from scratch.
- Memorise the cheat-sheet table as a single unit; it pays back almost immediately.
Now practice Spanish
Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.
Start learning Spanish→Related Topics
- Preposiciones: panorama generalA1 — An overview of the Spanish preposition inventory, their core meanings, and the fundamental rule that prepositions never map one-to-one to English.
- En para ubicación: 'en casa'A1 — Spanish uses 'en' for all three English location prepositions — in, on, at — collapsing them into a single word and using it for static location, transport, and (in peninsular Spanish) movement into a place with 'entrar en'.
- A para tiempo: '¿a qué hora?'A1 — The preposition a marks clock time in Spanish — a las tres, a las nueve y media, a mediodía. Contrast with en (months, years, seasons) and por (parts of day).
- Por para causa: '¿por qué?'A2 — Spanish 'por' answers 'why?' — it marks cause, motive, reason, and the agent of passive voice. It contrasts with 'para' (purpose / goal), and the difference between 'because of' and 'in order to' is one of the longest-running learner headaches in Spanish.
- Verbos con preposición 'en'B1 — A closed list of Spanish verbs requires the preposition 'en' before their complement — pensar en, insistir en, consistir en, fijarse en, entrar en. Most cluster around focus, insistence, conversion, and trust, and the English-Spanish preposition mapping rarely matches.