When should I use
at for a particular point in time?
1. Joe and Jill couldn't reach us at our time of need. They reached us too late. 2. Big Corporation reaches customers at their time of need. 3. The ambulance reached me precisely at my time of need.
Please note that in each of these situations, the point in time is a brief period.
I recall the general rule of thumb as:
in - periods of time. Ex. "I'll see you in June.", "I'll see you in five minutes." on - days and dates. Ex. "I'll see you on Tuesday." at - particular time. Ex. "I'll see you at 6 o'clock."
But I'm unsure which is correct in the above examples.
Which is the correct preposition in each of the above examples?