Prepositions: In, On, and At

Preposition Usage :

 “in” with periods of times and places.
 “on” with specific days.
 “at” with specific times and specific places.



Notice how they are used in the following situations:
preposition
in :
Time :
Year, Month,In 1999, In December.

Place :
Country, State, City, In Japan, In Utah, In Taipei.

On :
Time :
Day, Date
On Saturday, On May 1.
Place :
Street
On Main Street, On 1st Ave.
At :
Time :
At 8:00, At 7:30
Place :
Address
At 815 East Main Street