The next big sun event for the Northern Hemisphere is the summer solstice on June 21, the longest day of the year, when Earth's northern half is most directly tilted toward the sun. Solstices & Equinoxes for Sunnyvale (Surrounding 10 Years) Current Season. While the day-to-day variations in weather are much more complex, the vernal equinox is a sign that warmer days are on the way. Diagram of the Earths seasons as seen from the south. It marks the north's first day of spring - snowy weather in some areas notwithstanding - and the beginning of fall for those in the Southern Hemisphere. These are the days when the Sun is exactly above the Equator, which makes day and night of equal length. The vernal equinox occurs as the sun passes over the equator from Earth's perspective and the Northern Hemisphere begins to tilt toward the sun, leading to longer days in the north and shorter days in the south. The equinoxes happen in March (about March 21) and September (about September 23). The Wheel of the Year in the Northern Hemisphere.Some Pagans in the Southern Hemisphere advance these dates six months to coincide with their own seasons. In the United States, for example, the best known system is for seasons to start at equinoxes and solstices. Solstice And Equinox Dates 2010 To 2020: Dates and times of the Summer / Winter Solstices and Spring / Autumn Equinoxes for 2010 to 2020. What is a solstice As the Earth rotates on an imaginary pole called its axis, we get our daily cycle of night and day. The image was created by combining the three color channels of the satellite's Visible Infrared Imaging Radiometer Suite (VIIRS) instrument. From left to right, a June solstice, a September equinox, a December solstice, a March equinox, via NASA Earth Observatory. The Suomi NPP satellite took this image of the snow-covered northeastern United States and Canada on March 18, 2018.
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