When is the Autumnal Equinox? Specifically, the Northern Hemisphere marks the autumnal equinox on Friday, September 22, 2018, at exactly 9:54 P.M. Year Autumnal Equinox (Northern Hemisphere) 2017 Friday, September 22 2018 Saturday, September 22 2019 Monday, September 23 What is the Autumnal Equinox? The Autumnal equinox—also called the September equinox—is the astronomical start of fall in the Northern Hemisphere and spring in the Southern Hemisphere. $100 Late Registration Fee applies to students who have not enrolled by the close of Registration. $100 Late Payment Fee applies to students who do not pay their fees or do not pay their fees by the due date. Monday, March 20, 2017 - Sunday, August 20, 2017. Faculty Orders for Textbooks Due for Fall 2017. Fall 2017 Dates & Deadlines. Apply & Register for Fall Quarter. It's not too late! Apply for admission if you are a new student to Foothill College or a returning former student. Fall classes begin Sept. View schedule of classes. Last day for international students to apply for Fall was June 30, 2017. The word equinox comes from the Latin aequus (equal) and nox (night). During the equinox, the Sun crosses what we call the “celestial equator” (just imagine the line that marks the equator on Earth extending up into the sky) from north to south. Earth’s two hemispheres are receiving the Sun’s rays about equally. The Sun is overhead at noon as seen from the equator. At this point, the amount of nighttime and daytime (sunlight) are roughly equal to each other. Another definition of fall is nights of below-freezing temperatures combined with days of temperatures below 70 degrees Fahrenheit. From here on out, the temperatures begin to drop and the days start to get shorter than the nights. It is the summer’s great last heat, It is the fall’s first chill: They meet.
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