... breakfast
At
... dinner
At
... 10 o’clock
At
... my birthday
On
... the afternoon
In
... Wednesday
On
... lunch
At
... a rainy day
On
... the weekend
At (BR.) / On (Am.)
... autumn
In
... night
At
... half past two
At
... summer
In
... December
In
... New Year's Day
On
... tonight
-
... Christmas Day
On
... 1999
In
... the morning
In
... 8 July
On
… the 1980s
In
... 12 April 1961
On
... spring
In
... winter
In