from an ancient link
ArcGIS Desktop Help 9.3 - Working with date fields
which puts it in your time period
Gregorian calendar - Wikipedia, the free encyclopedia
why japanese characters is beyond me
It appears to be a bug, you should submit an Esri Support incident (Incident opened, bug logged).
I can reproduce the behavior using a table in a file geodatabase. If you use a cursor, the correct values are shown, it is just a display issue in ArcGIS Pro.
Thanks Joshua for exploring this. It is a curious one.
[BUG-000094943 : Date values containing a year of 1600 or earlier do not display correctly in ArcGIS Pro.] was just submitted for this issue.
Kory Kramer, thanks for following through and updating the GeoNet discussion.
Thanks Kory!
Was this ever resolved? I have encountered a similar problem using "Map Time" overlays (i.e. a dynamic text for dates) within a time animation in ArcGIS Pro 2.2.2., but only with dates on or before 1/1/1600. In those instances, the dynamic date text simply does appear in the overlay.
- Brad