John Herschel

" Herschel himself thought catastrophic extinction and renewal "an inadequate conception of the Creator" and by analogy with other intermediate causes "the origination of fresh species could it ever come under our cognizance would be found to be a natural in contradistinction to a miraculous process". 24219 days his proposal has never been adopted because the Gregorian calendar is based on the mean time between vernal equinoxes (currently 365.

He named seven moons of Saturn and four moons of Uranus. He made many contributions to the science of photography and investigated colour blindness and the chemical power of ultraviolet rays. He was the son of Mary Baldwin and astronomer Sir William Herschel and the father of 12 children.