"in" & "on" translations with time
Past
Future-Next
Future-This
During-While
Skip    (if future or past isn't applicable)

Sentence Examples
I will work in 3 days. (Future-Next)
They will leave on Monday. (Future-this)
I brought a car in July. (Past)
I like swimming in the summer. (During-While)
School start in the fall. (Skip)