Prépositions de temps : in, on, at
in pour les grandes périodes, on pour les jours spécifiques, et at pour les moments précis.
Grammar Rule in 30 Seconds
Use 'at' for specific times, 'on' for days and dates, and 'in' for long periods like months and years.
- Use 'at' for precise clock times like 'at 5:00 PM'.
- Use 'on' for specific days and dates like 'on Monday'.
- Use 'in' for months, years, and seasons like 'in summer'.
Overview
in 17h pour recevoir un emoji perplexe en retour ? Les petits mots causent de grands maux de tête en anglais. Ces minuscules prépositions sont les feux de signalisation de vos phrases.in, on et at pour différentes tranches de temps.In couvre de gros blocs comme les mois et les années.On gère les jours et dates spécifiques. At est pour le moment précis sur l'horloge. C'est comme zoomer sur une carte.à 5 minutes alors qu'il vient de se réveiller. Il faut connaître les règles pour ne pas se faire piéger !How This Grammar Works
in. C'est pour les périodes générales et longues.on. C'est pour les jours spécifiques.at. C'est pour les moments précis dans le temps.in pour une heure précise, c'est comme essayer de manger de la soupe avec une fourchette. Ça ne marche pas ! La plupart du temps, la règle suit cette logique de taille.at night qu'il faudra simplement mémoriser. Utilisez ces règles pour vos légendes Instagram ou votre prochaine invitation Zoom.
Formation Pattern
at + Heure Précise.
at 9:00 AM, at noon.
on + Jours et Dates.
on Monday, on July 4th, on my birthday.
in + Longues Périodes.
in October, in 2025, in the summer, in the morning.
When To Use It
at pour les heures de l'horloge. C'est pour le moment exact où votre Uber arrive. Utilisez-le pour des points comme at sunset ou at bedtime. Utilisez at night parce que l'anglais est bizarre comme ça.on pour tout ce que vous pouvez trouver sur une page de calendrier. Cela inclut les jours comme on Friday. Cela inclut aussi les dates comme on May 12th. Si le mot contient day, utilisez on. Exemples : on Christmas Day.in pour les grandes choses. Utilisez-le pour les mois comme in January. Utilisez-le pour les années comme in 1999. Utilisez-le pour les saisons comme in spring. Vous l'utilisez aussi pour les moments de la journée. Exemples : in the morning, in the afternoon, in the evening.
Common Mistakes
in Monday. C'est une erreur classique de débutant. Dites on Monday.at the morning. C'est très étrange pour une oreille native. Dites in the morning.in 2024.Contrast With Similar Patterns
In the car (lieu) vs In the morning (temps). Pour le temps, on se concentre sur le quand.Quick FAQ
at ou in pour la nuit ?R: Toujours at night. C'est une exception à la règle de in the morning.
R: Utilisez on my birthday. C'est un jour spécifique.
Time Preposition Categories
| Preposition | Usage Category | Examples |
|---|---|---|
|
At
|
Precise Time / Points
|
at 3:00, at noon, at dinner, at bedtime
|
|
On
|
Days / Dates
|
on Monday, on Christmas Day, on my birthday
|
|
In
|
Months / Years
|
in January, in 2025, in the 90s
|
|
In
|
Seasons
|
in summer, in the fall, in winter
|
|
In
|
Parts of Day
|
in the morning, in the afternoon, in the evening
|
|
At
|
Exceptions (Night)
|
at night, at the weekend (UK)
|
Meanings
These prepositions act as markers to tell the listener exactly when an event occurs relative to the calendar or clock.
Precise Time (At)
Used for specific points on a clock or specific moments in the day.
“I wake up at 7:00.”
“The stars come out at night.”
Days and Dates (On)
Used for 24-hour periods, including days of the week and specific calendar dates.
“I play soccer on Tuesdays.”
“My birthday is on May 5th.”
Long Periods (In)
Used for months, years, centuries, seasons, and general parts of the day.
“It is hot in August.”
“I was born in 1995.”
Reference Table
| Préposition | Utilisation | Exemples | Contexte Moderne |
|---|---|---|---|
|
at
|
Moment Précis
|
at 5:30 PM, at noon
|
Heure d'arrivée Uber
|
|
at
|
Exceptions
|
at night, at the weekend
|
Soirée jeux vidéo
|
|
on
|
Jours
|
on Monday, on Friday
|
Réunion Zoom hebdomadaire
|
|
on
|
Dates
|
on July 4th, on Oct 21st
|
Post d'anniversaire sur IG
|
|
in
|
Parties du Jour
|
in the morning, in the evening
|
Boire son café du matin
|
|
in
|
Mois/Années
|
in June, in 2025
|
Sortie Spotify Wrapped
|
|
in
|
Saisons
|
in summer, in winter
|
Vlog de vacances d'été
|
Spectre de formalité
I shall meet with you on Monday. (scheduling)
I'll see you on Monday. (scheduling)
See ya Monday! (scheduling)
Catch you Mon. (scheduling)
La carte des prépositions de temps
IN (Général)
- Mois In June
- Années In 2025
ON (Jour Spécifique)
- Jours On Monday
- Dates On May 1st
AT (Précis)
- Heure exacte At 9 AM
- Moments At noon
Du grand au petit : La pyramide du temps
Quelle préposition dois-je utiliser ?
Est-ce une heure exacte ?
Est-ce un jour ou une date ?
Catégories d'utilisation courante
Heures exactes
- • at 5:00
- • at noon
- • at midnight
Jours et Dates
- • on Friday
- • on June 10
- • on my birthday
Longues périodes
- • in winter
- • in 2024
- • in the 90s
Exemples par niveau
I wake up at 6:00.
Me despierto a las 6:00.
The party is on Saturday.
La fiesta es el sábado.
My birthday is in July.
Mi cumpleaños es en julio.
I study in the evening.
Estudio por la tarde.
We met on October 12th.
Nos conocimos el 12 de octubre.
I don't like driving at night.
No me gusta conducir de noche.
The store opens in the morning.
La tienda abre por la mañana.
He was born in 1998.
Él nació en 1998.
I'll see you at the weekend.
Te veré el fin de semana.
The train leaves in five minutes.
El tren sale en cinco minutos.
We go skiing in winter.
Vamos a esquiar en invierno.
The meeting is at noon.
La reunión es al mediodía.
Please arrive on time for the interview.
Por favor, llegue a tiempo para la entrevista.
We arrived just in time for the start.
Llegamos justo a tiempo para el comienzo.
At the age of ten, she could play piano.
A los diez años, ella podía tocar el piano.
The project starts in the spring.
El proyecto comienza en la primavera.
On the morning of the wedding, it rained.
En la mañana de la boda, llovió.
At the turn of the century, life changed.
Al cambiar el siglo, la vida cambió.
In the heat of the moment, he agreed.
En el calor del momento, él aceptó.
The decision was made at the last minute.
La decisión se tomó en el último minuto.
In times of yore, knights rode horses.
En tiempos de antaño, los caballeros montaban caballos.
At no point during the day did he call.
En ningún momento del día llamó.
On the stroke of midnight, the year ends.
Al sonar la medianoche, el año termina.
In the interim, we must wait.
En el ínterin, debemos esperar.
Facile à confondre
Learners use 'in' when they mean 'before the end of'.
Both sound similar but have different meanings regarding punctuality.
Learners mix up physical/temporal points with results.
Erreurs courantes
I see you in Monday.
I see you on Monday.
The class is in 10:00.
The class is at 10:00.
I sleep in night.
I sleep at night.
I go on July.
I go in July.
I saw him in last Friday.
I saw him last Friday.
On the morning, I drink tea.
In the morning, I drink tea.
At 2023, I was a student.
In 2023, I was a student.
I will finish on two weeks.
I will finish in two weeks.
The meeting is in noon.
The meeting is at noon.
In the beginning of the movie...
At the beginning of the movie...
Structures de phrases
I have a ___ at ___ on ___.
In ___, the weather is ___.
I was born in ___ on ___.
At ___, I usually ___ in the ___.
Real World Usage
See u at 8!
I started my last job in 2021.
Your appointment is on Tuesday at 10:00.
Throwback to my trip in 2019!
The flight lands at 6:00 AM on Sunday.
The deadline is on Friday in the afternoon.
La règle du 'jour'
on. C'est super simple ! The meeting is on my birthday.
Attention : Nuit et Matin
in the morning mais at night. C'est une erreur courante au début. I like to walk in the morning but sleep at night.
Le weekend : petites différences
on the weekend et les Britanniques at the weekend. Les deux sont corrects, choisis celui que tu préfères ! "I'll see you on the weekend."Smart Tips
If the word 'Day' is in the name (like Christmas Day), use 'on'. If not, use 'at' or 'in'.
Always use 'on' if there is a number (the day) present.
Imagine 'next' and 'last' are magnets that push the preposition away.
Group 'morning, afternoon, evening' together for 'in', and keep 'night' separate for 'at'.
Prononciation
Weak form of 'at'
In natural speech, 'at' is often reduced to /ət/.
Linking 'on'
When 'on' is followed by a vowel, it links. 'On October' sounds like 'O-noctober'.
Time Stress
I'll be there AT five.
Stress the preposition if you are correcting someone's time.
Mémorise-le
Moyen mnémotechnique
AT a point, ON a day, IN a period stay.
Association visuelle
Imagine a pyramid. The sharp point at the top is 'AT' (a point in time). The middle slice is 'ON' (a flat calendar day). The big base is 'IN' (a large container of time).
Rhyme
At for clock, On for day, In for months—that's the way!
Story
I woke up AT 7:00 ON a sunny Monday IN June. The birds were singing IN the morning, and I felt great.
Word Web
Défi
Look at your calendar for next week. Write down three things you are doing using 'at', 'on', and 'in'.
Notes culturelles
British speakers say 'at the weekend'.
American speakers say 'on the weekend'.
In international business, dates are often written DD/MM/YY, but prepositions remain the same.
These prepositions come from Old English: 'æt' (at), 'on' (on), and 'in' (in).
Amorces de conversation
What do you usually do at 8:00 PM?
When is your birthday?
What happened in 2020?
Do you prefer working in the morning or at night?
Sujets d'écriture
Erreurs courantes
Test Yourself
The party starts ___ 9 PM.
at pour les heures précises comme 21h00.Choose the grammatically correct sentence:
on.Find and fix the mistake:
I usually go to the gym in Mondays.
on.Score: /3
Exercices pratiques
8 exercisesI have a meeting ___ 9:00 AM.
My birthday is ___ June.
Find and fix the mistake:
I go to the gym in Mondays.
The stars shine ___ night.
party / Saturday / is / the / on
1. 5:00, 2. Monday, 3. 2024
I'll see you ___ next week.
We arrived ___ the morning.
Score: /8
Practice Bank
10 exercisesI love to drink tea ___ the morning.
The movie starts on 7:30.
on / meet / Let's / Saturday
Él nació en 1995.
Select the correct phrase:
Match the pairs:
I'll see you ___ July.
We went to Paris at the summer.
Pick the right one:
Class is ___ 2:00 PM.
Score: /10
FAQ (8)
This is an old idiomatic exception in English. There is no logical reason, but 'at night' is the standard form.
Use 'on' for specific dates (on May 5th) and 'in' for just the month (in May).
Both are correct! 'At' is British, and 'on' is American.
No, that is incorrect. Days of the week always use 'on'.
Use 'in' for seasons (in summer, in winter).
No. Words like 'yesterday', 'today', and 'tomorrow' do not need prepositions.
Yes, 'noon' and 'midnight' are specific points in time, so they use 'at'.
Use 'in' for decades and centuries because they are long periods of time.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
en / a
Spanish uses 'en' for days of the week, but English uses 'on'.
à / en / le
French doesn't use a preposition for days of the week.
um / am / im
The logic is almost identical to English.
ni (に)
One particle (ni) covers at, on, and in.
fī (في)
Arabic relies heavily on 'fī' where English splits into three.
zài (在) / (none)
Chinese usually omits prepositions for time.
Learning Path
Prerequisites
Vidéos associées
01:14 Tune in on September 3 for our next episode of The Android Show
01:13 Tune in on October 30 for our next episode of The Android Show
07:17 What caused the fall of one of the most influential empires in history? - Mostafa Minawi
Prepositions of TIME 👉 IN / ON / AT / BY 👈 Common English Grammar Mistakes
mmmEnglish
IN / ON / AT - Prepositions of PLACE AND TIME | English Grammar Lesson (+ Free PDF & Quiz)
English with Lucy
English Grammar: The Prepositions ON, AT, IN, BY
ENGLISH with James · engVid
Related Grammar Rules
Le verbe à particule 'Face up to' (Accepter la réalité)
Overview Ce verbe phraséologique concerne le passage mental de l'évitement à la reconnaissance. Il fait spécifiquement r...
Verbe à particule: Take off (Enlever & Partir)
### Overview Le phrasal verb `take off` est un pilier de la langue anglaise. Pour nous, francophones, il peut être déro...
Attends une seconde ! Utiliser 'Hold on'
### Overview Le verbe à particule `hold on` est une pierre angulaire de l'anglais parlé. Pour nous, francophones, il pe...
S'habiller : Vêtements Formels & Costumes (Dress up)
### Introduction Le verbe phrasal `dress up` est un outil essentiel en anglais pour décrire l'acte de porter une tenue...
Verbes à Particule en Anglais : Guide du Débutant
### Overview Salut à toi ! Aujourd'hui, on s'attaque à un monument de la langue anglaise : les `phrasal verbs` (verbes...
