Each day of the gods, it was explained by the Brahmans, was a year to mortals. Multiplied by 360 days, 12,000 divine years equalled 4,320,000 human years. This Maha-yuga, multiplied by 1000, gave the "Day of Brahma" as 4,320,000,000 human years. The shortest Indian Yuga is the Babylonian 120 saroi multiplied by 10=1200 divine years for the Kali Yuga; twice that number gives the Dvapara Yuga of 2400 divine years; then the Treta Yuga is 2400 + 1200 = 3600 divine years, and Krita Yuga 3600 + 1200 = 4800 divine years. The influence of Babylonia is apparent in these calculations. During the Vedic period "Yuga" usually signified a "generation", and there are no certain references to the four Ages as such. The names "Kali", "Dvapara", "Treta", and "Krita" "occur as the designations of throws of dice".[332] It was after the arrival of the "late comers", the post-Vedic Aryans, that the Yuga system was developed in India.[333] In _Indian Myth and Legend[334] it is shown that the Indian and Irish Ages have the same colour sequence: (1) White or Silvern, (2) Red or Bronze, (3) Yellow or Golden, and (4) Black or Iron. The Greek order is: (1) Golden, (2) Silvern, (3) Bronze, and (4) Iron. The Babylonians coloured the seven planets as follows: the moon, silvern; the sun, golden; Mars, red; Saturn, black; Jupiter, orange; Venus, yellow; and Mercury, blue. As the ten antediluvian kings who reigned for 120 saroi had an astral significance, their long reigns corresponding "with the distances separating certain of the principal stars in or near the ecliptic",[335] it seems highly probable that the planets were similarly connected with mythical ages which were equated with the "four quarters" of the celestial regions and the four regions of the earth, which in Gaelic story are called "the four red divisions of the world". Three of the planets may have been heralds of change. Venus, as "Dilbat", was the "Proclaimer", and both Jupiter and Mercury were called "Face voices of light", and "Heroes of the rising sun" among other names. Jupiter may have been the herald of the "Golden Age" as a morning star. This planet was also associated with bronze, as "Kakkub Urud", "the star of bronze", while Mars was "Kakkub Aban Kha-urud," "the star of the bronze fish stone". Mercury, the lapis lazuli planet, may have been connected with the black Saturn, the ghost of the dead sun, the demoniac elder god; in Egypt lapis lazuli was the hair colour of Ra when he grew old, and Egyptologists translate it as black.[336] The rare and regular appearances of Mercury may have suggested the planet's connection with a recurring Age. Venus as an evening star might be regarded as the herald of the lunar or silver age; she was propitious as a bearded deity and interchanged with Merodach as a seasonal herald.