I. On

Preposition ON is used with:

• days of week (on Monday)
• dates (on 4th of July)
  
• names of holidays if it contains the word Day (on Christmas Day)
• expressions on the weekend and on weekends (American English)
  

II. In

Preposition IN is used with:

• year (in 2010)
• months (in January)
• times of the day (in the morning)
• seasons (in summer)

III. At

Preposition AT is used with:

• time (at 2 o'clock)
• certain times of the day (at night, at sunset)
  
• holiday periods (at Christmas)
• expressions at the weekend and at weekends (British English)
  

Download FREE Worksheet  Prepositions of Time: in, on, at - Basic (69.49 kB) It contains rules on how to use prepositions of time in, on, and at, and a an exercise. It can be used by teachers in their classrooms, or as a self study tools. Uploading this worksheet to other websites and or redistributing it for commercial purposes is strictly prohibited.

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