The Usage of In, On, and At in Time and Location
IN (General - Bigger)
Time: Centuries, Decades, Years, Months, Weeks. E.g.: The 1800's, The 80's, 1970, July, 2 Weeks
Location: Country, City, Neighborhood. E.g.: England, London, Chinatown
ON (More Specific - Smaller)
Time: Days, Weekend. May 7th, 1964, My Birthday, Friday, The Weekend
Location: Streets, Avenues. Oxford Street, The Corner
