Well, I did it again. Took a nap, and awoke to total confusion. The main confusion is: why is it totally dark out at 10:30 a.m.? There was a *Twilight Zone *episode like this, which doesn’t help. And Wednesday morning our trash gets picked up, and it’s still sitting there, though the morning is mostly over. Add to that: I have to call my cardiologist, and for some reason nobody’s answering the phone.
Think I’ll just go back to bed.
I remember something like this happening when I was a boy. Actually slept when it was nap time on a Sunday afternoon, woke up and everybody else in the house was asleep, the living room clock said 6:30 and it was twilight-ish outside, so I thought it was Monday morning already.
No, turns out it was still Sunday evening. Mom made spare-ribs and we watched an episode of Buck Rogers. 
Set your watch, phone, and clocks to display 24 hour time like they do in civilized countries and this problem will never bother you again.
Darkness at 2230 is never confusing. And you *know *the doctor’s office is closed then.
I have done this. Many, many years ago I was working three jobs in an effort to fund a month of skiing in Summit County, CO. I got home from one job, fell asleep on the couch, and woke up at 6:45. I changed clothes in a panic and drove off to my job that started at 7:00 am.
On the way, I passed a Domino’s pizza and thought “Why is Domino’s open at this hour?”
About that time, I realized that the morning radio show I normally listened to wasn’t on, and the light of understanding switched on. It was 6:45 pm.
Guilty, your Honor! During the 1996 Olympics in Atlanta many of us worked off hour shifts to help lessen the traffic around town. My temporary shift started and ended about 3 hours earlier that normal. Got home one day, fell asleep on the couch and woke up to see 7:00 on the clock. Oh, crap, 2 hours late for work and it’s a 45 minute drive away! I called to let someone knnow I was running very late. When no one answered I left a message. I changed clothes, jumped in the car and headed toward downtown. About 10 minutes into my drive the Braves baseball broadcast came on the radio. My first thought was “Where the heck are they playing that the game begins at 7:30 AM? China???”. Then realization slowly dawned. It was 7:00 PM.
The bad part was that I had left tangible evidence of my idiocy on the office voicemail - complete with time stamp. I caught all manner of grief for that the next morning…
I had an episode just like that the night that Comet Kohoutek was supposed to make its brilliant dazzling Comet Of The Millenium appearance (December 28, 1973). I had taken a long nap that day, in preparation for staying up all night, and got my internal clock all wrong. I ended up sitting up in a break-room on campus, 8 stories up where I thought I would have a good view out the window. It was dark, about 8:00 p.m. but I thought it was about 8:00 a.m. and I sat for hours wondering why it wasn’t getting light already. The fact that I was half-asleep and groggy the whole time didn’t help my thought processes any. I never did see that no-show of a comet.
At least you didn’t drive 45 minutes there and then realize it was evening. 
I work on ships, once a few years ago we were alongside a remote part of Scotland in winter. It was a Saturday and due to the weather/location decided to stay on board and not go up the road. Drinking in the crew bar from lunch time, I decided at some unknown hour to have a nap in my cabin. I awoke at 9o’clock and thought I was late for work. I quickly got dressed and was running up the clearway (internal passage on the ship) When I passed a friend ‘Where the F you going Dave’
‘Work I’m late!’
‘Its 9pm you prick’
‘Oh… back to the bar then’
The day I wrote my last university exam a bunch of us guys went out and tore the town apart. I believe it went on for many, many hours, well into the next day.
To this day I still recall the strange feeling waking up in the afternoon, not sure if it was the day following the exam or the day after that.
My gf came over and started grilling me as to what I had been up to, did I know what day it was (no), do I remember anything (no, well, very little).
I contacted some of the other guys, couldn’t get ahold of others. Some were awol for a few days. The others had various stories.
But still there remains that gap of many missing hours.
You say that like it’s a bad thing. 
The thing is, my partner is out of town on business, so I was dealing with this as my own little phenomenon. But when it was still dark out at 10:30 - and I couldn’t forget that TZ episode - I came close to calling my cousin, and asking her if it was still dark where she lived. I never would have lived that down.