I guess I am dense, but restating the problem is not a solution. Referring to esri documentation about dates is also not a solution.
ArcGIS has dropped the ball on this. I have date-time in a CSV file. when converted to a shapefile the time is lost. I have over 375,000 records, so retyping anything is not an option. turns out too that converting my CSV file date-time column to text does not help either because arcMap sees that text column and identifies it as date and drops the time anyway. I cannot see a solution.
Why would anyone need 375,000+ records? ships crossing an ocean, or airplanes flying over a nation for two weeks are two reasons.