how do you import an excel date/timestamp into smart sheet and have both date/time shown?

I captured date/timestamp in smart sheet 09/17/2020 13:35:44 and loaded this into smart sheet but the loaded value truncated the time, i.e, when loaded smart sheet showed 09/17/2020, but the time stamp was lost (truncated off). How can i also get the time stamp to be loaded, either in the same field or a departe field?