"""Nox"", meaning ""night"". In other words, the equinoxes are the only times when the subsolar point is on the equator, meaning that the Sun is exactly overhead at a point on the equatorial line. The subsolar point crosses the equator moving northward at the March equinox and southward at the September equinox. The equinoxes, along with solstices, are directly related to the seasons of the year. In the northern hemisphere, the vernal equinox (March) conventionally marks the beginning of spring in most cultures and is considered the start of the New Year in Hindu calendar and the Persian calendar or"
"Vernal Equinox (Spring Equinox, when the day and the night is of equal length, set at March 21 in the Gregorian Calendar). It begins the first month, named Nisanu/Nisan/Abib. The month of Nisan is important since it begins the Spring Feasts of Israel. The observation of the New Moon may be influenced by the weather condition, so the Rosh Chodesh may be delayed for one or two days. But over all the errors cancel each other, and the calendar system remains accurate. The intercalary month could be a second Sixth Month (Ululu II), as often practiced in Mesopatamia, or a"
"are rooted in, so as to occur on average on March 21. Because the Earth takes approximately 365.25 days to go around the Sun, the precise time of the equinox is not the same each year, and generally will occur about six hours later from one year to the next. February 29 of a leap year causes that year's vernal equinox to fall about eighteen hours earlier compared with the previous year. Since 1900 the vernal equinox date has ranged from March 20 at 08h (2000) GMT to March 21 at 19h (1903) GMT. March 19 at 23:20 will occur"
"vernal equinox in UT always falling either on 20 or 21 March in the period of 1797 to 2043, falling on 19 March in 1796 the last time and in 2044 the next. Except for 2003 and 2007, the vernal equinox has started on 20 March since 1980, and is projected to until 2043. Because the Earth's axis is at an angle, some signs take longer to rise than others, and the farther away from the equator the observer is situated, the greater the difference. Thus, signs are spoken of as ""long"" or ""short"" ascension. The zodiac system was developed"
"to seasonal lag the autumnal equinox is considerably warmer than the vernal equinox in most regions. However even with seasonal lag the autumnal equinox is cooler than the summer solstice in most regions as well as the vernal equinox being warmer than the winter solstice even in most oceanic areas. In eastern Canada the seasonal lag is consistent both in summer and winter, resulting in February and August being the coldest and warmest months, respectively. In Western Europe the lag is lower in spite of the Atlantic coastline, usually around a month, which is also consistent with many inland areas"
"in the Southern Hemisphere, where the peak summer solstice solar altitude occurs on December 21. On the equator, the sun will be straight overhead and a vertical stick will cast no shadow at solar noon on the equinoxes. On the vernal equinox, north of the subsolar point (on the equator) the vertical stick's shadow will point a little westwards of true north (NNW) reading 336.5° from true north and little eastwards of true south (SSE) reading 156.5° from true north. On the autumnal equinox, north of the subsolar point (on the equator), the shadow will point a little eastwards of"
"end of summer and the beginning of autumn (autumnal equinox) in the Northern Hemisphere, while marking the end of winter and the start of spring (vernal equinox) in the Southern Hemisphere. The September equinox is one point in time commonly used to determine the length of the tropical year. Date and time of the September equinox that occurred from the year 2010 to 2018 (UT) are listed as follows: The point where the Sun crosses the celestial equator southwards is called the first point of Libra. However, due to the precession of the equinoxes, this point is no longer in"
"interior translucent-or-opaque window quilts, drapes, shutters, movable trellises, etc. can be used for hourly, daily or seasonal sun and heat transfer control (without any active electrical air conditioning). Everywhere around the world during the equinoxes (March 20/21 and September 22/23) except for the poles, the sun rises due east and sets due west. In the Northern Hemisphere, the equinox sun peaks in the southern half (about halfway up from the horizon at mid latitude) of the sky, while in the Southern Hemisphere, that sun peaks in the northern half of the sky. When facing the equator, the sun appears to"
"in the Northern Hemisphere's spring Equinox (March 21), it will cross the opposite sign in the spring Equinox in the Southern Hemisphere (September 21). For instance, the Age of Pisces is complemented by its opposite astrological sign of Virgo (the Virgin); so a few refer to the Piscean age as the 'Age of Pisces-Virgo'. Adopting this approach, the Age of Aquarius would become the Age of Aquarius-Leo. Ray Grasse also claims that each sign of the zodiac is involving with the opposite sign. William Sullivan in ""The Secret of the Incas"" claims there is a direct connection between the history"
"usually considered to span the entirety of December, January, and February in the Northern Hemisphere and June, July, and August in the Southern. Astronomically, the winter solstice, being the day of the year which has fewest hours of daylight, ought to be in the middle of the season, but seasonal lag means that the coldest period normally follows the solstice by a few weeks. In some cultures, the season is regarded as beginning at the solstice and ending on the following equinox – in the Northern Hemisphere, depending on the year, this corresponds to the period between 21 or 22"
"2018–19 North American winter The 2018–19 North American winter refers to winter in North America as it will occur across the continent from late 2018 through early 2019. 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 2018 will occur on December 21, 2018, and ends at the March equinox, which in 2018 will occur on March 20, 2019. Based on the meteorological definition, the first day of winter"
"the direction of the North Pole. Six months later, this pole will experience a midnight sun, a day of 24 hours, again reversing with the South Pole. By astronomical convention, the four seasons can be determined by the solstices—the points in the orbit of maximum axial tilt toward or away from the Sun—and the equinoxes, when the direction of the tilt and the direction to the Sun are perpendicular. In the Northern Hemisphere, winter solstice currently occurs around 21 December; summer solstice is near 21 June, spring equinox is around 20 March and autumnal equinox is about 22 or 23"
"around September 22), the Northern Hemisphere tips toward the Sun, with the maximum amount occurring on about June 21. For the other half of the year, the same happens, but in the Southern Hemisphere instead of the Northern, with the maximum around December 21. The two instants when the Sun is directly overhead at the Equator are the equinoxes. Also at that moment, both the North Pole and the South Pole of the Earth are just on the terminator, and hence day and night are equally divided between the two hemispheres. Around the March equinox, the Northern Hemisphere will be"
"2017–18 North American winter The 2017–18 North American winter refers to winter in North America as it occurred across the continent from late 2017 through early 2018. 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 began at the winter solstice, which in 2017 occurred on December 21, and ends at the March equinox, which in 2018 occurred on March 20. Based on the meteorological definition, the first day of winter is December 1 and the"
"fixed at 21 March in the Julian reckoning, corresponding to 1 April in the Gregorian calendar. The Vernal equinox is celebrated throughout Greater Iran as ""Noruz"" meaning ""New Day"" on 21 March. However, in the ancient Assyrian, Akkadian and Babylonian traditions, the spring festival was celebrated in the first days of the month known as ""Nisan"" and the calendar adopted by the ancient Assyrians had the month ""Nisan"" at the beginning of the calendar lending to the term ""Kha b' Nisan"", or the ""first of Nisan"". In the 1950s, a rising upsurge in Assyrian nationalism resulted in the creation of"
"was killed as a result of this outbreak, and others were injured. 69 tornadoes were confirmed as a result of this outbreak. 2017–18 North American winter The 2017–18 North American winter refers to winter in North America as it occurred across the continent from late 2017 through early 2018. 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 began at the winter solstice, which in 2017 occurred on December 21, and ends at the March equinox,"
"Dutch Elm Disease. The equinoctial Earth Day is celebrated on the March equinox (around March 20) to mark the precise moment of astronomical spring in the Northern Hemisphere, and of astronomical autumn in the Southern Hemisphere. An equinox in astronomy is that point in time (not a whole day) when the Sun is directly above the Earth's equator, occurring around March 20 and September 23 each year. In most cultures, the equinoxes and solstices are considered to start or separate the seasons. John McConnell first introduced the idea of a global holiday called ""Earth Day"" at the 1969 UNESCO Conference"
"2016–17 North American winter The 2016–17 North American winter refers to winter in North America as it occurred across the continent from late 2016 through early 2017. 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 2016 occurred on December 21, and ends at the March equinox, which in 2017 occurred on March 20. Based on the meteorological definition, the first day of winter is December 1 and the"
"the sun passes overhead twice a year. In the Northern Hemisphere, in the sun's apparent northward migration after the March equinox, it passes overhead once, then after the June solstice, at which time it reaches the Tropic of Cancer, it passes over again on its apparent southward journey. After the September equinox the sun passes into the Southern Hemisphere. It then passes similarly over the southern tropical regions until it reaches the Tropic of Capricorn at the December solstice, and back again as it returns northwards to the Equator. In the two temperate zones, consisting of the tepid latitudes, the"
"2012–13 North American winter The 2012–13 North American winter refers to winter in North America as it occurred across the continent from late 2012 through early 2013. 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. Based on the meteorological definition, the first day of winter is December 1 and"
"during the weeks of vernal equinox. Even meteorite falls are more common during the northern hemisphere's spring season. Although this phenomenon has been known for quite some time, the reason behind the anomaly is not fully understood by scientists. Some researchers attribute this to an intrinsic variation in the meteoroid population along Earth's orbit, with a peak in big fireball-producing debris around spring and early summer. Others have pointed out that during this period the ecliptic is (in the northern hemisphere) high in the sky in the late afternoon and early evening. This means that fireball radiants with an asteroidal"
"2011–12 North American winter The 2011–12 North American winter refers to winter in North America as it occurred across the continent from late 2011 through early 2012. 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 2011 occurred late on December 21 (early on December 22 in EST), and ends at the March equinox, which in 2012 occurred on March 20 (March 19 in CDT and EDT). Based on"
"tropics. From the March equinox to the September equinox, the Sun rises within 23.5° north of due east, and sets within 23.5° north of due west. From the September equinox to the March equinox, the Sun rises within 23.5° south of due east and sets within 23.5° south of due west. The Sun's path lies entirely in the northern half of the celestial sphere from the March equinox to the September equinox, but lies entirely in the southern half of the celestial sphere from the September equinox to the March equinox. On the equinoxes, the equatorial Sun culminates at the"
"2010–11 North American winter The 2010–11 North American winter refers to winter in North America as it occurred across the North American continent from late 2010 through early 2011. 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 2010 occurred late on December 21 (early on December 22 in EST), and ends at the March equinox, which in 2011 occurred on March 20. Based on the meteorological definition, the"
"Autumn Autumn, also known as fall in US English and sometimes in Canadian English, is one of the four temperate seasons. Autumn marks the transition from summer to winter, in September (Northern Hemisphere) or March (Southern Hemisphere), when the duration of daylight becomes noticeably shorter and the temperature cools down considerably. One of its main features is the shedding of leaves from deciduous trees. Some cultures regard the autumnal equinox as ""mid-autumn"", while others with a longer temperature lag treat it as the start of autumn. Meteorologists (and most of the temperate countries in the southern hemisphere) use a definition"
"after the fall equinox in each respective hemisphere. In the half-year centered on the June solstice, the Sun rises north of east and sets north of west, which means longer days with shorter nights for the northern hemisphere and shorter days with longer nights for the southern hemisphere. In the half-year centered on the December solstice, the Sun rises south of east and sets south of west and the durations of day and night are reversed. Also on the day of an equinox, the Sun rises everywhere on Earth (except at the poles) at about 06:00 and sets at about"
"based on Gregorian calendar months, with autumn being September, October, and November in the northern hemisphere, and March, April, and May in the southern hemisphere. In North America, autumn traditionally starts on September 21 and ends on December 21. It is considered to start with the September equinox (21 to 24 September) and end with the winter solstice (21 or 22 December). Popular culture in the United States associates Labor Day, the first Monday in September, as the end of summer and the start of autumn; certain summer traditions, such as wearing white, are discouraged after that date. As daytime"
"was killed in Queens, New York, and seven were injured on March 18, all due to vehicle-related accidents. 2012–13 North American winter The 2012–13 North American winter refers to winter in North America as it occurred across the continent from late 2012 through early 2013. 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"
"Equinoxes, when there is midnight sun at the South Pole. This period is also referred to as Pitrayana (with the Pitrus (i.e. ancestors) being placed at the South Pole). This festival is currently celebrated on 14 or 15 January but due to axial precession of the earth it will continue to shift away from the actual season. The season occurs based on tropical sun (without ayanamsha). The earth revolves around sun with a tilt of 23.45 degrees. When the tilt is facing the sun we get summer and when the tilt is away from the sun we get winter. That"
"equinox beginning ""Western"" spring on March 20 or 21 when the sun is at the celestial longitude of 0°. The idea that an egg is easier to balance on the spring equinox has since become an American urban legend, and egg-balancing events are sometimes held on that date. In 1976, New York artist Donna Henes started organizing egg-balancing ceremonies with the stated goal of bringing about world peace and international harmony. These events, which often drew thousands of people, are still held annually by Henes in New York City. In fact, the balancing of most eggs on their broad ends"
"May May is the fifth month of the year in the Julian and Gregorian Calendars and the third of seven months to have a length of 31 days. May is a month of spring in the Northern Hemisphere and autumn in the Southern Hemisphere. Therefore, May in the Southern Hemisphere is the seasonal equivalent of November in the Northern Hemisphere and vice versa. Late May typically marks the of the summer vacation season in the United States and Canada and ends on Labor Day, the first Monday of September. The month of May (in Latin, ""Maius"") was named for the"
"Hemisphere, the beginning of the traditional astronomical summer is 21 June (meteorological summer begins on 1 June). In the Southern Hemisphere, meteorological winter begins on 1 June. At the start of June, the sun rises in the constellation of Taurus; at the end of June, the sun rises in the constellation of Gemini. However, due to the precession of the equinoxes, June begins with the sun in the astrological sign of Gemini, and ends with the sun in the astrological sign of Cancer. The Latin name for June is ""Junius"". Ovid offers multiple etymologies for the name in the ""Fasti"","
"2015–16 North American winter The 2015–16 North American winter refers to winter in North America as it occurred across the continent from late 2015 through early 2016. 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 2015 occurred late on December 21, and ends at the March equinox, which in 2016 occurred on March 20. Based on the meteorological definition, the first day of winter is December 1 and"