Rollup on Date/Time column with Max(values) displays date but missing the time

I have a column called “Visit” that’s all the client’s visit dates/times and am trying to add a “Last Visit” column that displays the last date/time of their appointment. I did a Rollup of Max(values) on the “Visits” column to display in the “Last Visit” column, but it is only returning the date of the last visit and not the time. How do I modify this Max(values) Rollup so it has the last date AND time of their visit: e.g. 4/10/20 2:00 PM ?