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The ancient Indians did not use the seven day week. The most ancient usage of day names used in India was that of the Nakshatra. There are twenty seven lunar asterisms or constellations in the old lunar zodiac. This number was derived from the average number of days it took the Moon to complete one circuit of the heavens in relation to any particular star (one sidereal revolution). Since the Hindus didn't use hours to divide their day, the natural consequence of using a seven day week would not follow. Instead they divided a day into 60 equal parts called ghatikas. Each ghatika is equal to 24 minutes. The word "ghatika" means little jar and thus the use of water clocks suggest itself. A ghatika is further divided into 60 vinadikas. So between the two cultures, it was the Hindus who made direct use of the sexagesimal system whereas the Chaldeans used an indirect method of 24 hours.
It wasn't until much later in the third century AD where we find the first usage of the seven day week in India. Indeed much of the rest of the world had not adopted it until after the first century AD. It was unknown to the writers of the New Testament who did not mention anything about the day of the week on which Christ was crucified or the the week day which he is alleged to have ascended to heaven. The fixing of Friday and Sunday for these incidents is a later concoction, dating from the fifth century after Christ. All that the New Testament books say is that he was crucified on the day before the Hebrew festival of Passover which used to be celebrated and is still celebrated on the full‐moon day of the month of Nisan. The continuous seven day week was unknown to the classical Greeks, the Romans, the Hindus and early Christians. It was introduced into the Christian world by an edict of the Roman emperor Constantine, about 323 AD, who changed the Sabbath to the Lord's Day (Sunday), the week day next to the Jewish Sabbath. Its introduction into India is about the same time and from the same sources. The week days are not found in earlier Hindu scriptures like the Vedas of the classics like the great epic Mahabharata. They occur only from 484 AD, but not in inscriptions of 300 AD or earlier. Even now, they form but an unimportant part in the religious observances of the Hindus which are determined by the Moon's phases and lunar asterisms.
In the schema of the Moon's phases we see a repeated pattern to that of Jupiter and Saturn. A lunar month is made up of 30 tithis. Each tithi is determined when the moon moves in advance of twelve degrees ahead of the Sun. Here we see the numbers 30 and 12 that are common with Saturn and Jupiter. A complete synodic period (a complete revolution around the zodiac in relation to the Sun) of the Moon, however, takes only 29 civil days. (A civil day for the Indians is reckoned from sunrise to sunrise). It is quite a regular occurrence for a tithi to be expunged from the consecutive civil day count. This characteristic of the Hindu calendar is not found in the Greek, Chinese or Mesopotamian calendars. Other cultures, without exception, use solely a civil day count of 28, 29 and 30 days for their lunation cycles and had not even considered a pure lunar day count independent from the civil reckoning. The consistency of the Hindu astronomical methods make it unlikely that they borrowed their knowledge from other sources. And the repeated usage of the sexagesimal measurement makes it more like that they were the inventors of the system.
The lunar asterisms (nakshatras) are derived from the average daily motion of the Moon's mean sidereal cycle, which is 13° 20′ of arc. In a circle of 360 degrees this would make twenty seven nakshatras. Each nakshatra has a planetary ruler and they are shown as follows:
The Six Thousand Year Barrier — An Essay on Hindu Astrology
nachi naga
similiarly jupiter or guru bhagavan and saturns cycle is also used,gods leelas are scientific in nature 
