SAN GRAND, sankranti in Sanskrit, is the first day of each month of the Indian solar calendar, based on the shifting of the sun from one house (rasi) to another. From quite early in human history, the sun, and its satellites, the planets, came to be regarded as objects endowed with celestial mind, a definite personality and the capability of influencing the destinies of human beings. They became the deities whose favourable intervention was sought by men in their affairs.
AMAVAS (AMAVASYA), massia in Punjabi, lit. a combination of ama, i.e. together, and vasya, i.e. stationing, signifying coming of the sun and the moon together in one line, is the last day of the dark half of the lunar month when the moon remains entirely hidden from our view. The twenty-eight naksatras, considered to be the wives of the moon, are the lunar mansions or stations through which the moon passes as does the sun through the twelve signs of the zodiac.The life of an individual is believed to be deeply influenced by the naksatra through which the moon passed at the time of his birth.Thus, different days such as panchami (fifth), ekadasi (eleventh), puranmashi (the fifteenth day when the moon is full) and amavas assumed a special significance in the Hindu tradition.