Prepositions of Time

In, at, on and no preposition with time words:

Prepositions of time - here's a list of the time words that need 'on', 'in', 'at' and some that don't need any preposition. Be careful - many students of English use 'on' with months (it should be 'in'), or put a prepostion before 'next' when we don't need one.

at
  • times: at 8pm, at midnight, at 6:30
  • holiday periods: at Christmas, at Easter
  • at night
  • at the weekend
  • at lunchtime, at dinnertime, at breakfast time
on
  • days: on Monday, on my birthday, on Christmas Day
  • days + morning / afternoon / evening / night: on Tuesday morning
  • dates: on the 20th of June
in
  • years: in 1992, in 2006
  • months: in December, in June
  • decades: in the sixties, in the 1790s
  • centuries: in the 19th century
  • seasons: in winter, in summer
  • in the morning, in the afternoon, in the evening
no
prep
  • next week, year, month etc
  • last night, year etc
  • this morning, month etc
  • every day, night, years etc
  • today, tomorrow, yesterday