I have a numeric field of geological age dates in thousands of years ago for instance 14.5 or 25.6 or 9.3. I would like to use some of the time slider capability in ArcGIS Pro and AGOL, but it appears that the both require your data to be in the standard time or time-date fields. I was able to come up with a work around years ago in ArcMAP but Pro and AGOL don't appear to allow using non time or date time fields.