Originally Posted by
gmt4
Dimming the cabin down for a few hours isn't going screw up their sleep for days. Crossing ten times zones will.
While I agree that crossing ten timezones is always going to be rough, one of the important effects of exposure to sunlight is to help reset the circadian rhythms. Rather than just throwing around random assertions, here's some free reading on the topic from the NIH:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4632990/