Prepositions of Time — In, On, At (Time)
Different prepositions for different time units
Category: Prepositions
The Rule
'At' for specific times (at 3 PM). 'On' for days/dates (on Monday). 'In' for longer periods (in January, in 2024, in the morning).
Why This Matters
Japanese uses に (ni) for almost all time references. English forces you to choose between at/on/in based on the time unit's size. This three-way distinction doesn't exist in Japanese.
Examples
• The meeting is at 3 PM. — "会議は午後3時にあります。" ['At' for clock times] • I was born on July 4th. — "7月4日に生まれました。" ['On' for specific dates and days] • It snows a lot in winter. — "冬にたくさん雪が降ります。" ['In' for seasons, months, years]
Common Mistakes
❌ I wake up in 7 AM. ✅ I wake up at 7 AM. → Specific clock times use 'at', not 'in'. ❌ I have a meeting at Monday. ✅ I have a meeting on Monday. → Days of the week use 'on', not 'at'.
Quick Tip
AT = specific moment (at noon). ON = specific day (on Friday). IN = a period (in March). Think: precision decreases from AT → ON → IN.
AT = specific moment (at noon). ON = specific day (on Friday). IN = a period (in March). Think: precision decreases from AT → ON → IN.
Examples
Common Mistakes
Incorrect: I wake up in 7 AM. → Correct: I wake up at 7 AM.. Specific clock times use 'at', not 'in'.
Incorrect: I have a meeting at Monday. → Correct: I have a meeting on Monday.. Days of the week use 'on', not 'at'.
Quiz
Fill in: 'We met ___ 2020.'