In
At
On
Years in 1996 Hours at five o’clock
Dates on 21st May on May 21st
Parts of the day
in the morning (except night)
In phrases such as
at night at noon at midnight at the weekend at the moment
Days of the week
on Friday on Thursday
Seasons of the year
in winter
Special days
at Christmas at Easter
In expressions such as
on my birthday on a cold day on Christmas day
In
At
On
Years in 1996 Hours at five
o’clock Dates on 21st
May on May 21st
Parts of the day
in the morning (except night)
In phrases such as
at night at noon at midnight at the weekend at the moment
Days of the week
on Friday on Thursday
Seasons of the year
in winter
Special days
at Christmas at Easter
In expressions such as
on my birthday on a cold day on Christmas day
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