Sorry, but this so much differs depending on which month/day it is. My "biological clock" is reliably and wakes me up more or less the same time, however compar

Sorry, but this so much differs depending on which month/day it is. My "biological clock" is reliably and wakes me up more or less the same time, however comparing winter/summer has a huge difference - having total darkness or sun heating your room. Regardless of DST.