The Julian day is the continuous count of days since the beginning of the Julian period, and is used primarily by astronomers, and in software for easily calculating elapsed days between two events (e.g. food production date and sell by date). The Julian period is a chronological interval of 7980 years; year 1 of the Julian Period was 4713 BC (−4712). The Julian calendar year 2022 is year 6735 of the current Julian Period. The next Julian Period begins in the year AD 3268. Historians used the period to identify Julian calendar years within which an event occurred when no such year was given in the historical record, or when the year given by previous historians was incorrect. The Julian day number (JDN) is the integer assigned to a whole solar day in the Julian day count starting from noon Universal Time, with Julian day number 0 assigned to the day starting at noon on Monday, January 1, 4713 BC, proleptic Julian calendar (November 24, 4714 BC, in the proleptic Gregorian calendar), a date at which three multi-year cycles started (which are: Indiction, Solar, and Lunar cycles) and which preceded any dates in recorded history. For example, the Julian day number for the day starting at 12:00 UT (noon) on January 1, 2000, was 2 451 545. The Julian date (JD) of any instant is the Julian day number plus the fraction of a day since the preceding noon in Universal Time. Julian dates are expressed as a Julian day number with a decimal fraction added. For example, the Julian Date for 00:30:00.0 UT January 1, 2013, is 2 456 293.520 833. Expressed as a Julian date, this page was loaded at 2459920.8344329. [] (Wikipedia).
History of the Holidays: History of Memorial Day | History
Learn more about the History of Memorial Day. #HistoryChannel Subscribe for more HISTORY: http://histv.co/SubscribeHistoryYT Check out exclusive HISTORY content: Newsletter: https://www.history.com/newsletter Website - http://www.history.com Facebook - https://www.facebook.com/History Twi
From playlist History Celebrates Memorial Day
John F Kennedy Inaugurated (1961) | A Day That Shook the World
A Day That Shook the World recalls the days of the 20th century that proved to be era-defining and pivotal in the course of modern history. These are the days on which political revolutions, technological breakthroughs, and sporting triumphs took place, and whose effects were felt the worl
From playlist JOHN F. KENNEDY
What is Boxing Day? | National Geographic
What is Boxing Day and when is it celebrated? Despite having the word "boxing" in its name, this 19th-century holiday has little to do with jabs or hooks. Learn about the origins of this "bonus holiday" and how it is celebrated today through shopping, feasts, and sport. ➡ Subscribe: http:/
From playlist News | National Geographic
Memorial Day: A Forgotten History
Memorial Day hearkens to the most divisive time in the nation's history, but brings Americans together in common cause — remembering the soldiers who died in combat serving their country. The History Guy remembers the origins of the American holiday, "Memorial Day." This episode was origi
From playlist US History
From playlist Week 0 (Spring 2015)
History of the Holidays: History of Thanksgiving | History
Although Thanksgiving celebrations dated back to the first European settlements in America, it was not until the 1860s that Abraham Lincoln declared the last Thursday of November to be a national holiday. HISTORY®, now reaching more than 98 million homes, is the leading destination for aw
From playlist History of the Holidays | History
History of the Holidays: History of Veterans Day | History
A look at the history of the holiday honoring those who fought for America, both living and dead. HISTORY®, now reaching more than 98 million homes, is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, an
From playlist History Celebrates Veteran's Day
How "Forgotten Genius" Percy Julian Inspired These Two Students I NOVA I PBS
The grandson of Alabama slaves, African American chemist Percy Julian met with every possible barrier in a deeply segregated America. He was a man of genius, devotion, and determination, and as a Black man, he was also an outsider, fighting to make a place for himself in a profession and c
From playlist Original shorts
Climate Science, Waves, and PDE's for the Tropics ( 1 ) - Andrew J. Majda
Lecture 1: Climate Science, Waves, and PDE's for the Tropics: Observations, Theory, and Numerics Abstract: Geophysical flows are a rich source of novel problems for applied mathematics and the contemporary theory of partial differential equations. The reason for this is that many physical
From playlist Mathematical Perspectives on Clouds, Climate, and Tropical Meteorology
Mathematica Tutorial 24 - Is the price of Bitcoin bounded by a logistic function?
In this Mathematica tutorial you will learn about mathematical modelling with the logistic function. As an example, we will consider the price of Bitcoin on the 10 year anniversary of the genesis block. In retrospect, after making this video, intuition alone tells me that perhaps P(t) =
From playlist Mathematica Tutorials
Mathematica Tutorial 26 - Modelling the Gold Price with Least Squares
In this mathematica tutorial you will learn about modelling the price of stocks, shares, or commodities over time. In this case we will look at the price of gold since 1973 and you will learn how to apply the technique of least squares data fitting and regression analysis to the price of g
From playlist Mathematica Tutorials
January 1 and the forgotten history of the New Year
In a sense, every day could be seen as the beginning of the new year, in that every day occurs about 365 days after the same day the previous year. So how did we come to adopt January 1st as the beginning of the year? It is history that deserves to be remembered and Happy New Year! This i
From playlist History without War
Date and Calendar Functionality
For the latest information, please visit: http://www.wolfram.com Speaker: Nick Lariviere Wolfram developers and colleagues discussed the latest in innovative technologies for cloud computing, interactive deployment, mobile devices, and more.
From playlist Wolfram Technology Conference 2015
29 and Leap Years - Numberphile
Astronomer Dr Meghan Gray on leap years and Julian dates. More links & stuff in full description below ↓↓↓ Meghan is making a "guest appearance" on Numberphile and is more familiar to viewers of our sister channels DeepSkyVideos and Sixty Symbols. DeepSkyVideos: https://www.youtube.com
From playlist Women in Mathematics - Numberphile
So it's February 29th and we have 366 days this year instead of 365- what's the deal with Leap Years? ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow
From playlist SciShow Dose
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From playlist Coursera Regression V2
Hurricane Katrina (2005) | A Day That Shook the World
A Day That Shook the World recalls the days of the 20th century that proved to be era-defining and pivotal in the course of modern history. These are the days on which political revolutions, technological breakthroughs, and sporting triumphs took place, and whose effects were felt the worl
From playlist NATURAL DISASTERS