Don't show "empty" dates

ui/src/common/DateField.js

@@ -0,0 +1,13 @@
+import React from 'react'
+import { DateField as RADateField } from 'react-admin'
+
+export const DateField = (props) => {
+  const { record, source } = props
+  const value = record?.[source]
+  if (value === '0001-01-01T00:00:00Z' || value === null) return null
+  return <RADateField {...props} />
+}
+
+DateField.defaultProps = {
+  addLabel: true,
+}