If you find some of the other threads about the calendar upgrades you will find I have been beset by two different RL incidents that could not be foreseen when I started this project.
At the moment I am about a week or so away from updating my test website with all the required features at least visible. I'm currently restructuring the main index.php so it understands how to display recurring events. (In the past when I've said something was a week away, it ended up taking a month because of unforeseen RL incidents so if someone I know gets hurt I'm blaming you
RSVPs and Subscriptions are basically feature complete. Categories is complete on the admin side and needs better support in the various day/week/month view screens. Recurring events mangle the code for those same views so much, I needed to pause category work during the restructuring. In addition, originally I was going to include recurring events right in the event editor. But the form is so big that I need to move it to its own form.
Additionally, I'm restructuring the template files so that things that are the same have the same name regardless of view. Additionally there will be more variables available in all views than are currently displayed. So if you want the start time of events to appear in the monthly view, the data is available for you to add to the template.
Oh, and I didn't start work on the project until September. June was just when the donations started.