A calendar only works when a day is selected. You can tell a day is selected by it having a blue background.
Both the From and To calendars default to today's date.
However, if you navigate to another month, you must explicitly select a day by clicking on it.
Lastly, for the Records report, the dates are always ignored.
Broadcast is the difference between private and public contacts.
By setting Broadcast to Public, you permit other people's search results to show your contacts.
By setting it to Private, you stop other people's search results displaying your contacts.
So, by this means, you can keep some or all of your contact information private.
It means the entity has been deleted, but since entities are not really deleted (in case they need to be recovered), they are flagged as hidden, so the search code does not retrieve them.
It depends on the menu: