This is Yoko, Japan.
Thank you for "SOMETHING TO THINK ABOUT!!!"
I will share it with JEARN members as usual.
I appreciate some mighty power gives me 86,400 seconds everyday equally with other persons.
You say " when we go to sleep at night, any remaining time is NOT credited to us."
I would say....that remaining time still in us, not lost ever.
It stays in us and taking time to recover poor mind and body for tomorrow.
I sometimes stay so late at night and work till dawn, mostly used up all my 86,400 seconds,
and what happens to me next day, even I have new 86,400 seconds for a new day,
my mind and body are not functional, dead ! I waste my time.
So we need unused seconds while sleeping.
Our tired body and mind today are using wisely those seconds at night for tomorrow.