This must be a simple question for a native speaker.
I know that we use "on" with dates: I'll see you on January 1st.
And we use "at" with times: I'll see you at 17:30.
But what preposition has to be used when we speak for date and time:
I'll see you on January 1st at 17:30. looks ok.
But what in this case: It happened on 2014-01-01 17:30.
Is "on" correct when we are specifying the date and the time?
The date-time comes as a ready text as 2014-01-01 17:30 and I cannot modify it. I can only put text before the date-time string or after it.
Best Answer
The construction for your fourth example would be the same as your third:
While most people would understand it without the AT, it is strictly correct to include it.