I've been using an inverted calendar for months now (I think it may have originally been done by thebowers, but at this point I'm not certain of that).
The only issue with the attached inverted Calendar is that, when you create a new event, the text for "All day event" is black on black, so that if you're not familiar with the calendar new event layout, you wouldn't know what the option was next to the checkbox.
I was hoping one of the talented themers here could fix that, so that "All day event" is white text on black. Anyone willing to take on this challenge?
Thanks so much in advance to anyone who does!
UPDATE: The issue has been FIXED by ecsnead69!!! I've now attached update zips with an unthemed inverted version of the Calendar and one that I themed slightly with some blue accents, both with the fixed text by ecsnead.