TIME PREPOSITIONS

There are three prepositions in English that are used with time in, at, on. Generally, in shows the "largest" time or place, on shows dates and time, and at usually shows the "smallest" time or place. Let's look at the usage for in, at, on.

Note: Do not use in/at/on before "next" or "last"

We will get married next year.
Their baby was born last March.