Page 55 - اللغة الإنجليزية - قسم الإرشاد السياحى- الترم الأول

English for Guidance by Prof. Adel AlSheikh

Prepositions of Time AT - ON – IN

AT
We use AT with specific times (hour / minutes):

 I get up at 7 o'clock.
 My English class starts at 10am.
 She finishes work at 6.15
 I left the party at midnight.

Midnight (and midday) is a specific hour which is why we use AT.
12am = midnight
12pm = midday / noon
We use AT for a holiday period of two or more days:

 Do you normally get together with your relatives at Christmas?
 Did you eat a lot of chocolate at Easter?

ON
We use ON for specific days and dates:

 I will return it to you on Wednesday.
 They got married on Friday the 13th.
 We get paid on the 20th of every month.
 I drank too much milk on New Year's eve.

Remember that for dates, we use ordinal numbers.
E.g. the First of September (not the one of September)

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