DateTime fields viewed/used as separate Date and Time fields

The existing DateTime fields are clumsy and using the arrow keys to move to the time after using the date picker can be a challenge. I was looking for something like the date and time fields in a MS outlook meeting request where you can quickly tab between fields and type text.

I see that I can create a Date field and a Time field. Is there a way to show a DateTime field as two separate boxes on a form to make data entry easier?

Or is there a function that would take separate Date and Time fields and concatenate them together?

Thanks - Mark.