PREPOSITIONS OF TIME AT To tell the time: I went to bed at 10 o’clock at midnight at noon at dawn  To talk about holiday periods: Do you get together with your relatives at Christmas? I went shopping at the weekend  Fixed expressions: He is busy at the moment / at present ON With days: See you on Wednesday I met her on Tuesday morning  With dates: They got married on February 14 IN With parts of the day: (morning, afternoon, evening BUT *at night!) I go to school in the morning  With months: My birthday is in July  With seasons: I go on holiday in Summer IN With years: She was born in 2010  With centuries: The company was founded in the 19 th century  To indicate Length of time: I’ll be ready in 15 minutes AGO Ago refers to a definite point of time in the past: He was born months ago The party started an hour ago  ... company was founded in the 19 th century  To indicate Length of time: I’ll be ready in 15 minutes AGO Ago refers to a definite point of time in the past: He was born months ago The party started... Wednesday I met her on Tuesday morning  With dates: They got married on February 14 IN With parts of the day: (morning, afternoon, evening BUT *at night!) I go to school in the morning  With months:...AT To tell the time: I went to bed at 10 o’clock at midnight at noon at dawn  To talk about holiday periods: Do