See how to use the settings in the config to set the date format to display in ObjectListView

To set the date display format by default(for example, dd.MM.yyyy HH:mm) in the application(in GroupEdit’Ah, in ObjectListView), the config need to add a line

<add key="NullableDateTimeDefaultFormat" value="dd.MM.yyyy HH:mm" />

By default, the format short.

As DateTimePicker, located in GroupEdit form and have its own settings format, this setting in the config actually only affects the display in ObjectListView.