NUBIC/ncs_navigator_core — pull request #190 by phebal (2013-05-24 00:23:42+00:00)
Title: Store null event_start_dates in MDES format #4105

Cases can't store event_start_date in the 'special' MDES date format, and instead makes it null when importing. Warehouse refuses to take nulls for event_start_date and so we make them into MDES formatted strings signifying an unknow date: `9666-96-96` during operational enumeration.