I stumbled on this a while back, but I was never able to try it: naturschlaf.com/wew2.html
This week-end, I had a job to finish and I ended up working 24 hours non-stop, except for the meals, and then I had an unexpected problem and I finally stayed up 36 hours without sleeping. Since then, I only was able to sleep 3 or 4 hours at a time, and last night I woke up at one o’clock in the morning, unable to sleep more, so it’s a good moment to try this sleep schedule and see if it does anything for me.
I found that site to calculate the solar time where you are, if anyone is interested: fate.windada.com/cgi-bin/SolarTime_en