I've mentioned Labradoc (http://labradoc.com/) elsewhere on this thread but it seems like it might be worth you considering it too.
More so, if it doesn't suit you I'd be interested to know why--given you seem to have implemented a more manual approach to what Labradoc aims to do.
The major difference from what you've described is that Labradoc has a project-based rather than day-based focus. (Although there's no reason why a "day view" couldn't be an option...)
I actually noticed your Labradoc comment earlier and took a look. It's more or less what I'm looking for, without the weirdness of being embedded in Github. There are 2 reasons I'm not switching to it right now:
1. My system already works fine.
2. The default styling of Labradoc doesn't suit me. The blue/purple links and left-aligned text have a 2005ish look to me. Those would presumably be pretty easy to fix with a CSS overlay of some sort, but that would require a little tweaking.
But still, Labradoc looks like pretty much the same solution that I came up with, so I like it!
One suggestion: make the example have a link or screenshots to something that shows the Markdown side of things. Is there an editor? What does it look like? Even a screenshot tour would help lure people in.
More so, if it doesn't suit you I'd be interested to know why--given you seem to have implemented a more manual approach to what Labradoc aims to do.
The major difference from what you've described is that Labradoc has a project-based rather than day-based focus. (Although there's no reason why a "day view" couldn't be an option...)
(Labradoc also uses Markdown.)