December

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December:

see monthmonth,
in chronology, the conventional period of a lunation, i.e., passage of the moon through all its phases. It is usually computed at approximately 29 or 30 days. For the computation of the month and its harmony with the solar calendar and for the months in others than the
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first point of Capricornus

first point of Capricornusclick for a larger image
That point on the ecliptic occupied by the sun at the maximum southerly declination. Sometimes called the December solstice, the first point of Capricornus. The same as the winter solstice, the first point of Libra. The point of the intersection of the ecliptic and the celestial equator (equinoctial). When the sun is moving from the north to the south direction. It is denoted by the symbol image. Also called the winter, or December, equinox.
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