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While there is no well-agreed-upon date used to indicate the start of winter in the Northern Hemisphere, there are two definitions of winter which may be used. Based on the astronomical definition, winter begins at the winter solstice, which in 2012 occurred late on December 21, and ends at the March equinox, which in 2013 occurred on March 20. [1]
The winter solstice occurs during the hemisphere's winter. In the Northern Hemisphere, this is the December solstice (December 21 or 22) and in the Southern Hemisphere, this is the June solstice (June 20 or 21). Although the winter solstice itself lasts only a moment, the term also refers to the day on which it occurs.
The days are short and the nights are long. That can only mean one thing: The winter solstice is coming. The first day of winter for the northern hemisphere of Earth will begin on Dec. 21 at ...
The solstice usually – but not always – takes place on December 21. The date that the solstice occurs can move forward or back by a day because the solar year (the time it takes for the sun to ...
The winter solstice marks the shortest day and longest night of the year, according to the National Weather Service. This occurs due to the Earth's tilt from the sun.
The December-solstice solar year is the solar year based on the December solstice. It is thus the length of time between adjacent December solstices. The length of the December-solstice year has been relatively stable between 6000 BC and AD 2000, in the range of 49 minutes 30 seconds to 50 minutes in excess of 365 days 5 hours.
Earth southern solstice: 22 December, 15:00: Ursids peak 25 December, 21:06: Moon at apogee: 26 December, 00:10: Moon occults Jupiter: 28 December, 10:21: Full moon: 28 December, 23:48: Comet C/2012 K5 (LINEAR) at max brightness 30 December: Pluto at conjunction
The winter solstice marks the shortest day of the year in terms of hours of daylight -- and it's happening on Wednesday. Winter solstice: Everything you need to know about the shortest day of the year