After watching The Martian, I had falsely assumed that a day on mars is significantly longer than on earth, but it is actually only 40 minutes longer.
However, the question for me still remained: Can humans acclimate to shorter/longer days?
A more detailed follow up: Could a human acclimate to a 16 hour day? Or in the opposite direction, can a human acclimate to a 32 hour day?
I'm looking for studies and experiments in proportionately adjusting the awake and sleep time of a human. This should hopefully include changing the length of day and night artificially, such that a human would sleep during dark periods.