“The Julian calendar, which it replaced, computed the period of the earth’s orbit around the sun at 365.25 days. Pope Gregory XIII’s reform substituted a finer and more accurate calculation: 365.2425 days. Thanks to scientific advances since 1582 we now know that the exact length of the solar year is 365.2422 days.”

“The Julian calendar, which it replaced, computed the period of the earth’s orbit around the sun at 365.25 days. Pope Gregory XIII’s reform substituted a finer and more accurate calculation: 365.2425 days. Thanks to scientific advances since 1582 we now know that the exact length of the solar year is 365.2422 days.”

— Graham Hancock