Learn English – at/in/on the same day

prepositions

I have a sentence like:

We run the three programs __ the same day:

Choices are:

1) at

2) in

3) on

Which one is correct? You can suggest another better choice if any.

Best Answer

The problem with prepositions is that they follow few rules, and what rules they do follow are riddled with exceptions.

What is idiomatic in U.S. English is

We run the three programs on the same day

or

We run the three programs the same day.

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