Web Map shows wrong "beach sampling date" in popup window

Discussion created by marylandgis on Jul 7, 2011
Latest reply on Jan 17, 2017 by jg1295
I created a web map of beach monitoring sites and results for San Mateo County Calif.  The popup includes the sampling date.  The date in the popup does not match the date in the underlying data (feature service or shapefile or Excel table).  For example:

Data says 7/5/2011,   web map popup shows  7/4/2011 5:00 PM
Data says 5/17/2011, web map popup shows 5/16/2011 5:00 PM

This is consistently wrong for all the map points in all the popups.

The operational layers are on an ArcGIS server behind our county firewall, so you can't see them.  So I've documented and illustrated the problem in the attached 2-page PDF.  I hope you'll take a look and help figure this out.