Preposition In, On, and At

Prepositions: In, on, and at (with specific times and places)
The prepositions in, on, and at can be used to indicate time and place. Notice how they are used in the following situations:
Preposition Time Place
In Year, Month,
In 1999, In Mei Country, State, City
In Australia.
On Day, Date
On Saturday, On May 13 Street
On Main Street, On 1st Ave.
At Time
At 8:00, At 7:30 Address
At 815 East Main Street

in You use ‘in’ with periods of times and places.
Ex :
Ω in May
Ω in winter
Ω in indonesia

on You use ‘on’ with specific days
Ex :
 on Friday
 on mey 13

AT--
 At 7 o’clock
 At7.00m a.m
 At night
 At school

NOTE : America English : on the weekend OR on Weekends
at You use ‘at’ with specific times and specific places

NOTE : British English : at the weekend OR at Weekends
of Its mean belonging to, relating to, or being part of something.
You use ‘of’ with noun and –ing forms