It would be great when 'Publishing a Web Layer' in ArcGIS Pro that when you configure the web layer and select a Time Zone for the Date Fields that all time zones that are listed all execute in the same manner. Yukon has a fairly new time zone, and although it appears in the list of selectable time zones, when selected geoprocessing fails. If any other time zone is selected the layer publishes as expected.
If the time zones are read from the local machine then it would be great if they all participated equally when selected. If the time zones are from an installed system file then it would be great if all time zones were kept up to date.