Предлоги времени Prepositions of time

In On At
Months, years, decades, centuries
In May
In the 1980s
Parts of the day (having adjectives)
On a peaceful night
On Monday evening
The beginning or ending of something
At the beginning of
At first
After some time
In three years
In a few minutes
Holidays (with «day»)
On Christmas day
On wedding day
Parts of the day
At night
At lunchtime
In spring
In winter
Days and dates
On Monday
On June 17
At Christmas
At Easter
Parts of the day (with «the»)
In the morning
In the evening
Set expressions
On time
On holiday
Exact time
At 6 p.m.
At the moment