Redmine

It currently seems--unless I'm missing it--that Redmine doesn't provide a mechanism for querying on a ticket's closure date. This may rely on the existence of certain statuses (and possibly workflows) within a project, but perhaps if a project has the "Closed" status enabled the user could have an option to query on the date of last closure, which the system would record upon each closure of the ticket (after it was reopened, if applicable; other use cases for subsequent closures might come later).

My impetus for requesting this is to compare the Date Closed with the Due Date, and collect metrics on average lateness/earliness of closure across a project (or maybe multiple projects).