A couple years ago I found a spotted fawn in January. Found it hit by a car in February about a half mile from where I seen it the first time. I'm pretty sure I posted it on the site.
I wouldn't be surprised to know it happens every 6 months instead of the ONE that happens during the fall. I think the only reason we focus so much on the fall rut is because it's the only one we can hunt while it's happening.