A river which is 2525 kilometers long, which has been the lifeline of the entire stretch of the Ganga-Yamuna plains, with over 300 million dependents today, why is Ganga considered so sacred? What is the secret behind its water?

The current Gregorian calendar does not have 0 CE! Because 0 CE means there is no such year! The calendar directly jumps from 1 BCE to 1 CE which is quite natural when you consider the definition of Zero