Instruct: Given a question, retrieve passages that answer the question.
Query: Was there a year 0?
Cassini gave the following reasons for using a year 0:
Fred Espanak of NASA lists 50 phases of the moon within year 0, showing that it is a full year, not an instant in time. Jean Meeus gives the following explanation:
Although he used the usual French terms "avant J.-C." (before Jesus Christ) and "après J.-C." (after Jesus Christ) to label years elsewhere in his book, the Byzantine historian Venance Grumel used negative years (identified by a minus sign, −) to label BC years and unsigned positive years to label AD years in a table. He did so possibly to save space and put no year 0 between them.
A common year starting on Tuesday is any non-leap year (i.e. a year with 365 days) that begins on Tuesday, 1 January, and ends on Tuesday, 31 December. Its dominical letter hence is F. The current year, 2019, is a common year starting on Tuesday in the Gregorian calendar. The last such year was 2013 and the next such year will be 2030, or, likewise, 2014 and 2025 in the obsolete Julian calendar, see below for more. Any common year that starts on Sunday, Monday or Tuesday has two Friday the 13ths. This common year contains two Friday the 13ths in September and December. Leap years starting on Monday share this characteristic. From July of the year that precedes this year until September in this type of year is the longest period (14 months) that occurs without a Friday the 13th. Leap years starting on Saturday share this characteristic, from August of the common year that precedes it to October in that type of year.
The "Brāhmasphuṭasiddhānta" of Brahmagupta (598–668) is the earliest known text to treat zero as a number in its own right and to define operations involving zero. The author could not explain division by zero in his texts: his definition can be easily proven to lead to algebraic absurdities. According to Brahmagupta,
The Julian year, as used in astronomy and other sciences, is a time unit defined as exactly 365.25 days. This is the normal meaning of the unit "year" (symbol "a" from the Latin "annus") used in various scientific contexts. The Julian century of days and the Julian millennium of days are used in astronomical calculations. Fundamentally, expressing a time interval in Julian years is a way to precisely specify how many days (not how many "real" years), for long time intervals where stating the number of days would be unwieldy and unintuitive. By convention, the Julian year is used in the computation of the distance covered by a light-year.
A leap year starting on Friday is any year with 366 days (i.e. it includes 29 February) that begins on Friday 1 January and ends on Saturday 31 December. Its dominical letters hence are CB, such as the years 1904, 1932, 1960, 1988, 2016, 2044, 2072, and 2112 in the Gregorian calendar or, likewise, 2000 and 2028 in the obsolete Julian calendar. Any leap year that starts on Tuesday, Friday or Saturday has only one Friday the 13th; The only Friday the 13th in this leap year occurs in May. Common years starting on Saturday share this characteristic.
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International Ecological Society: Distinguished Statistical Ecologist (1998)
Ray is a one side infinite geodesic which is minimizing on each interval
Lifespan and gestation period are unknown, although it is assumed that sexual maturity is reached at about one year of age.
A leap year starting on Monday is any year with 366 days (i.e. it includes 29 February) that begins on Monday, 1 January, and ends on Tuesday, 31 December. Its dominical letters hence are GF, such as the years 1912, 1940, 1968, 1996, 2024, 2052, 2080, and 2120 in the Gregorian calendar or, likewise, 2008, 2036, and 2064 in the obsolete Julian calendar. 
Any leap year that starts on Monday, Wednesday or Thursday has two Friday the 13ths. This leap year contains two Friday the 13ths in September and December. Common years starting on Tuesday share this characteristic.
The decimal Hindu–Arabic numeral system with zero was developed in India by around AD 700. The development was gradual, spanning several centuries, but the decisive step was probably provided by Brahmagupta's formulation of zero as a number in AD 628. The system was revolutionary by including zero in positional notation, thereby limiting the number of individual digits to ten. It is considered an important milestone in the development of mathematics. One may distinguish between this positional "system", which is identical throughout the family, and the precise glyphs used to write the numerals, which varied regionally.
In 2009, Warner Premiere converted "Batgirl: Year One" into a motion comic. ""'s executive producer Bruce Timm and co-director Lauren Montgomery expressed interest in producing an animated movie based on "Batgirl: Year One". But DC cancelled all plans for an adaptation. However, the final episode of "", as part of Bat-Mite's alternate reality mini-movies, featured a CGI-animated clip of a Batgirl show including elements of "Batgirl: Year One".
In astronomy, the Julian year is a unit of time; it is defined as 365.25 days of exactly 86,400 seconds (SI base unit), totalling exactly 31,557,600 seconds in the Julian astronomical year.
Aside from regular features in The General Magazine, AH also produced a series of magazines focused on ASL but with some original SL content also, beginning in 1989. The ASL Annual was, as the name implies, released once a year, with issues in 1989, 1990, 1991 and 1992, and two issues were published in 1993 (called ASL Annual '93a and ASL Annual '93b). No issue was published in 1994, with issues again appearing in 1995, 1996 and 1997. The 1995 issue was named ASL Annual '95w (Winter) in anticipation of a second issue that year being printed in the summer, but it did not materialize. Scenarios located in the ASL Annual were numbered sequentially with an "A" prefix, either ASL Scenario A1, A2, etc., or SL Scenario A1, A2, etc., Deluxe ASL Scenario A1, A2, etc.
The sketch was invented prior to the actual year 2000, but the show's writers decided to keep the named year the same even after the passing of the titular year, in a sort of ironic twist. However, when the sketch was revived on "The Tonight Show with Conan O'Brien", Richter heaped ridicule upon O'Brien for failing to update the name of the skit nine years after the year 2000 had passed. The sketch is renamed "In the Year 3000", with the black robe (referred to as a 'ratty smock' by Richter) being replaced with a more futuristic-looking outfit consisting of a large metallic collar with a series of blinking lights, which Conan said were very expensive to make and Andy said smelled bad. Appearing on "Tonight" June 3, 2009, it was the first "Late Night" sketch to be carried over to Conan's "Tonight Show". The open to the sketch included narration by William Shatner and, on one occasion, George Takei.
In 2007, the Islamic Society of North America, the "Fiqh" Council of North America and the European Council for "Fatwa" and Research announced that they will henceforth use a calendar based on calculations using the same parameters as the "Umm al-Qura" calendar to determine (well in advance) the beginning of all lunar months (and therefore the days associated with all religious observances). This was intended as a first step on the way to unify, at some future time, Muslims' calendars throughout the world.
"Age of Empires", released on October 26, 1997, was the first game in the series, as well as the first major release from Ensemble Studios. It was one of the first history-based real-time strategy games made, utilizing the Genie game engine. GameSpot described it as a mix of "Civilization" and "". The game gives players a choice of 12 civilizations to develop from the Stone Age to the Iron Age. The expansion pack, "The Rise of Rome", published by Microsoft on October 31, 1998, introduced new features and four new civilizations, including the Romans. Although the two games had contained many software bugs, patches resolved many of the problems.
A common year starting on Thursday is any non-leap year (i.e. a year with 365 days) that begins on Thursday, 1 January, and ends on Thursday, 31 December. Its dominical letter hence is D. The most recent year of such kind was 2015 and the next one will be 2026 in the Gregorian calendar or, likewise, 2010 and 2021 in the obsolete Julian calendar, see below for more. This common year contains the most Friday the 13ths; specifically, the months of February, March, and November. Leap years starting on Sunday share this characteristic.
From February until March in this type of year is also the shortest period (one month) that occurs within a Friday the 13th.
The Cryptic era is an informal term for the earliest geologic evolution of the Earth and Moon. It is the oldest (informal) era of the Hadean eon, and it is commonly accepted to have begun close to 4533 million (about 4.533 billion) years ago when the Earth and Moon formed. No samples exist to date the transition between the Cryptic era and the following Basin Groups era for the Moon (see also Pre-Nectarian), though sometimes it is stated that this era ended 4150 million years ago for one or both of these bodies. Neither this time period, nor any other Hadean subdivision, has been officially recognized by the International Commission on Stratigraphy.
This will be the final year of the current format for Minor Counties competitions, with changes, including a change of name, scheduled to begin during 2020.
Michigan State University, Kellogg Biological Station: Eminent Ecologist (1992)
ㅝ is one of the Korean hangul. The Unicode for ㅝ is U+315D.
This enzyme belongs to the family of oxidoreductases, specifically those acting on paired donors, with O2 as oxidant and incorporation or reduction of oxygen. The oxygen incorporated need not be derived from O2 with 2-oxoglutarate as one donor, and incorporation of one atom o oxygen into each donor. The systematic name of this enzyme class is N6,N6,N6-trimethyl-L-lysine,2-oxoglutarate:oxygen oxidoreductase (3-hydroxylating). Other names in common use include trimethyllysine alpha-ketoglutarate dioxygenase, TML-alpha-ketoglutarate dioxygenase, TML hydroxylase, 6-N,6-N,6-N-trimethyl-L-lysine,2-oxoglutarate:oxygen oxidoreductase, and (3-hydroxylating). This enzyme participates in lysine degradation and L-carnitine biosynthesis and requires the presence of iron and ascorbate.
ㅗ is one of the Korean hangul. The Unicode for ㅗ is U+3151.
ㅌ is one of the Korean hangul. The Unicode for ㅌ is U+314C.