Morning, night....what difference does it make?  Since I covered all the windows it doesn't matter WHAT time I get out of my coffin.
Or into it!  Same here... doesn't matter whether it's morning, noon or night, I have sleep deprivation issues and just sleep when I can these days.  Like earlier, I was dog-tired at 8.45pm and went to bed... I woke at 12.35am and couldn't get back to sleep again.  It's now 3.37am and I might try again... would be nice to get a couple more hours before the grandkids get up creating havoc.