جشن مهر ( میترا ) ـ ۲۲ دسامبر ـ روشنی ، تابش ، گرمایش ، زایش ، زن ، زندگی ، آزادی

VOA, PERSIAN NEWS NETWORK, 22 December, December Solstice
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The December solstice, also known as the southern solstice, is the solstice that occurs each December - typically on 21 December, but may vary by one day in either direction according to the Gregorian calendar. In the Northern Hemisphere, the December solstice is the winter solstice (the day with the shortest period of daylight), whilst in the Southern Hemisphere it is the summer solstice (the day with the longest period of daylight).
The solstice also marks the changing of seasons in many countries. 21 December is the first day of winter (in the Northern Hemisphere) and the first day of summer (in the Southern Hemisphere).