Consonance now has a calendar UI for the scheduler tab of the main window. This is a significant milestone; up until now that feature has been very conspicuously absent. I had hoped to be be able to port some code from some other projects but ended up writing the entire widget from scratch. Consonance displayed a calendar event for the first time on 2007-12-30 at 16:33 (GMT). A screenshot is here and also attached to this post. This code is included as of r470.