How can I display the time in formula bar into cells?

Hello,

I tried several times, but I don't know how to do.

Would you like to help me with the question in the photo?

Thank you!

// LE: In formula bar, the time is fully displayed: mm/dd/yy HH:MM:SS AM/PM

In cell, there isn't fully displayed. How can I do that?

Try this:

[$-en-US]mm/dd/yy h:mm:ss AM/PM;@