FCP X 10.4: Date/Time display format change control

Final Cut Pro X 10.4

In Titles > Lower Third > Date/Time how do I control the display content of the date and time stamp which appears on the video?

Currently it shows the time and then the date below it such as "6:04 pm" and "March 15, 2018".

How can I instead show the time with seconds (e.g. "6:04:59 PM") and date with day name (e.g. "March 15, 2018 Thursday"?