Grammar Focus

Prepositions of Time: AT – ON – IN

Prepositions of time (χρονικές προθέσεις) help us say when something happens. The three most common ones are at, on and in.

at 7 o’clockon Mondayin May

1. AT (σε / στις για συγκεκριμένη ώρα)

📘 Theory (Θεωρία)

We use at for exact times and some fixed time expressions.

  • Clock time (ώρα): at 8 o’clock, at 7:30
  • Meal times / moments: at breakfast, at lunchtime, at night
  • Fixed phrases: at the weekend (British English), at Christmas

✅ Examples (Παραδείγματα)

  • School starts at 8:15. → Το σχολείο αρχίζει στις 8:15.
  • I go to bed at night. → Πηγαίνω για ύπνο τη νύχτα.
  • We have lunch at lunchtime. → Τρώμε μεσημεριανό την ώρα του μεσημεριανού.

📝 Practice – AT

Complete with at:

  1. I wake up ___ 7 o’clock.
  2. We eat dinner ___ night.
  3. The lesson starts ___ 9:30.

2. ON (σε / την για ημέρες και ημερομηνίες)

📘 Theory (Θεωρία)

We use on for days, dates and special days.

  • Days (ημέρες): on Monday, on Friday
  • Dates (ημερομηνίες): on 5th May, on 12 June
  • Special days: on my birthday, on Christmas Day

✅ Examples (Παραδείγματα)

  • We have English on Tuesday. → Έχουμε Αγγλικά την Τρίτη.
  • My birthday is on 10th March. → Τα γενέθλιά μου είναι στις 10 Μαρτίου.
  • I visit my grandparents on Sunday. → Επισκέπτομαι τους παππούδες μου την Κυριακή.

📝 Practice – ON

Complete with on:

  1. My party is ___ Saturday.
  2. Christmas Day is ___ 25th December.
  3. We play football ___ Fridays.

3. IN (σε / μέσα σε για μήνες, εποχές, χρόνια)

📘 Theory (Θεωρία)

We use in for longer periods of time: months, seasons, years and parts of the day.

  • Months (μήνες): in May, in December
  • Seasons (εποχές): in summer, in winter
  • Years (χρόνια): in 2026
  • Parts of the day: in the morning, in the afternoon, in the evening

✅ Examples (Παραδείγματα)

  • It is hot in summer. → Κάνει ζέστη το καλοκαίρι.
  • My birthday is in April. → Τα γενέθλιά μου είναι τον Απρίλιο.
  • I do my homework in the afternoon. → Κάνω την εργασία μου το απόγευμα.

Careful: we say in the morning, in the afternoon, in the evening, but at night.

📝 Practice – IN

Complete with in:

  1. We go swimming ___ summer.
  2. My birthday is ___ October.
  3. I brush my teeth ___ the morning.

4. AT – ON – IN: Quick Comparison

PrepositionUseExamples
ATexact timeat 6 o’clock, at night
ONdays / dateson Monday, on 3rd July
INmonths / seasons / years / parts of dayin May, in winter, in 2026, in the morning

Mini Examples

  • I wake up at 7 o’clock.
  • We have English on Wednesday.
  • It rains a lot in winter.

📝 Mini Quiz

Choose at / on / in:

  1. ___ Monday
  2. ___ 8 o’clock
  3. ___ the morning
  4. ___ July
  5. ___ my birthday
  6. ___ night
✅ Show answers

AT

  1. at
  2. at
  3. at

ON

  1. on
  2. on
  3. on

IN

  1. in
  2. in
  3. in

Mini Quiz

  1. on Monday
  2. at 8 o’clock
  3. in the morning
  4. in July
  5. on my birthday
  6. at night

Prepositions of Time – English Grammar Lessons

Prepositions at, in, on | Grammar test

AT ON IN - Prepositions of Time in English | Woodward English Grammar

In, On, At | Grammar Test | 10 English Quiz