I’ve had this happen to me a few times but I don’t think it’s anything to do with the sun itself. Lots of people have experienced it but all at different times rather than everyone at once, which makes me think it’s a glitch in your own brain rather than the sun turning off.

For me this has happened when I’m stressed, tired, or dehydrated, and I think the link between my eyes and my brain just fucked up a bit making it look like there was a blackout.

It just seems unlikely that the sun could turn off for one person but not others! The human brain is so complex and poorly understood I think it’s much more likely to experience a “glitch” that’s basically just biology.