well ... i know i can not and i have my reasons ....
there are two kinds of people .... day workers and night workers ... depending on their body nature
i am a night worker ... my peak energy time is after 1 am ... an hour work = 3 hours working after 8 am .... therefore i can not wake up at 6 even if i want to
you know although i wake up every day at 7:00 AM on weekends i wake up at 1:00 PM even if i went to sleep at 8:00 PM ... this is just how my body works