Prepositions of Time

At

The preposition that indicates an exact and specific time

On

The preposition that indicates a fixed date or a day

In

The preposition that indicates an indefinite and unspecific time of months, seasons, years, centuries and etc

From....to

The preposition that indicates a fixed time-span with the beginning and the end

Until

The preposition that indicates a specific or unspecific time or event up to a point

Since

The preposition that indicates a time-span beginning in a time in the past and still continuing in the present (now)

For

The preposition that indicates a period of time (amount of time) in the past, present, or future

Before

The preposition that indicates a prior event/ period of time from a point

After

The preposition that exactly opposite of before

During

The preposition that indicates a period of time throughout the course or duration of any event or action