Man made time is unnatural.   Time only moves forward, it does not repeat.   There really is no such thing as monday december or even 3 o'clock.  It is deceptive,  your birthday only happens once for example it does not repeat.  Always moving forward, a clock should be like a timer with the number always getting bigger.  That would be a better measurement that would not deceive but its still wrong.   The essence of time moves differently for each of us, relative and unique for each individual. To synchronize would be to deny your own natural internal clock.  The man made clock is unnatural and should not exist for you and without study may find prematurely aging you.