So I took off my blindfold and looked at the clock. It was on the front side of 4; earlier than 4:30, although since I went back to sleep shortly thereafter, I can't remember exactly what time.
I'm used to manually setting and unsetting my mental alarm clock. "Wake me up at 5:30." "Sleep until 10. Sleep until 10." (it takes more effort to turn the alarm off than to turn it on), but my mind throwing the illusion of clocks at ne is a new one.