I'm a fan of the Babylonian system myself. Days, hours, minutes, seconds. 360, 12, 60, 60; keep dividing the circle.
And the 5.25 days? Those are holy, outside of normal time. It works.
"The current Universe was created in Padma kalpa, the last day Kalpa of 50 th year of Bramha.This is 10.51 billion years ago.This figure is close to modern estimated 13.78 billion years."
But now the question is was it pure luck that the ancient humans came up with a number that is close to the current scientific values or is there something that is lost in time. May be they were advanced than us and we just don't know. Of course, no evidence = grain of salt.