So, this makes an additional calculation necessary on top of the normal calculation for January 1 and the calculation of whether or not the year is a leap year.

Each calendar is determined by the day of the week January 1 falls on and whether or not the year is a leap year.

The Gregorian year begins on January 1 and ends on December 31 with a length of 365 days in an ordinary year and 366 days in a leap year giving an average length of 365. 2425 days.

Under the reforms that instituted the Julian calendar, Intercalaris was abolished, leap years occurred regularly every fourth year, and in leap years February gained a 29th day.

This works unless the pattern is broken by a skipped leap year, but no leap year has been skipped since 1900 and no others will be skipped until 2100.

It cannot happen in a leap year.

As required by the Gregorian calendar, to compensate for the difference, an end-of-century year is not a leap year unless it is also exactly divisible by 400.

The concepts of the leap year and leap day are distinct from the leap second, which results from changes in the Earth's rotational speed.

A person who is born on February 29 may be called a " leapling " or a " leap year baby ".

( This assumes that Frederic is aware that 1900 will not be a leap year.

) This plot point was also used in a Sherlock Holmes story based on the Basil Rathbone era, where a friend of Dr. Watson's is a baronet who is due to receive his inheritance on the New Year's Day of the year where his twenty-first birthday will be celebrated, only for the law to deprive him of the money as he was born on February 29 ; with the 84-year-old Baronet distraught at the news that 1900 is not a leap year, Holmes helps the Baronet fake his death long enough for his grandson-who is the appropriate age to receive the inheritance-to establish his claim and receive the money himself.

** Oswald of Worcester ( in leap year only )

By Roman custom, February 24 is the day added to a leap year in the Julian calendar.

Lewis, at the head of the table, would leap up and move around behind the chairs of his guests making remarks that, when not highly offensive, were at least highly inappropriate, and then presently he collapsed and was put to bed.

What was missing in the Governor's argument, as in so many similar arguments, was a premise which would enable one to make the ethical leap from what might be militarily desirable to what is right.

Thus at the same time that William Henry Harrison was preparing to pacify the aborigines of Indiana Territory and winning fame at the battle of Tippecanoe, Anglo-Saxon settlement made a great leap into the center of the North American continent to the west of the American agricultural frontier.

Now the dirt highway was bordered on either side by a fairly deep drainage ditch, too broad to leap over unless you were an Olympic star.

Having volunteered that he was a man of about sixty, he bounded up the stairs and with each leap rendered the number less credible.

There was the freshness of color, the freedom of perception, the lack of self-consciousness, but with a twist that made the forms leap from the page and smack you in the eye.

Since 30 June 2012 when the last leap second was added, TAI has been exactly 35 seconds ahead of UTC.

The continued existence of TAI was questioned in a 2007 letter from the BIPM to the ITU-R which stated " In the case of a redefinition of UTC without leap seconds, the CCTF would consider discussing the possibility of suppressing TAI, as it would remain parallel to the continuous UTC.

Cuyp was one of the first Dutch painters to appreciate this new leap forward in style and while his own Both-inspired phase was quite short ( limited to the mid 1640s ) he did, more than any other contemporary Dutch artist, maximize the full chromatic scale for sunsets and sunrises.

A leap in technology occurred when the Gutenberg printing-press was invented in the 15th century.

The project was able to leap forward in design with the arrival of Harold McFarland, who had been researching 16-bit designs at Carnegie Mellon University.

A retelling of the original Doom using entirely new graphics technology, Doom 3 was hyped to provide as large a leap in realism and interactivity as the original Doom, and helped renew interest in the Doom franchise when it was released.

The leap day was introduced as part of the Julian reform.

February 29 came to be regarded as the leap day when the Roman system of numbering days was replaced by sequential numbering in the late Middle Ages.

A period of four years ending on a leap day was to be called a " Franciade.

The reform of 1906 was a giant leap in the political and social liberalization of the common Finnish people.

The difference between ET and UT is called ΔT ; it changes irregularly, but the long-term trend is parabolic, decreasing from ancient times until the nineteenth century, and increasing since then at a rate corresponding to an increase in the solar day length of 1. 7 ms per century ( see leap seconds ).

Years containing a leap day are called leap years.

The addition of the leap month ( Adar II ) is determined by observing in Israel the ripening of barley at a specific stage ( defined by Karaite tradition ) ( called aviv ), rather than using the calculated and fixed calendar of Rabbinic Judaism.

A year that is not a leap year is called a common year.

The long jump ( formerly commonly called the " broad jump ") is a track and field event in which athletes combine speed, strength, and agility in an attempt to leap as far as possible from a take off point.

* In the Coptic Orthodox Church, the New Year, called Neyrouz, coincides with 11 September in the Gregorian calendar between 1900 and 2099, with the exception of the year before Gregorian leap years, when Neyrouz occurs on 12 September.

However, because Universal Time is synchronous with night and day, and more precise atomic-frequency standards drift away from this, UT is still used to produce a correction ( called a leap second ) to atomic time, in order to obtain a broadcast form of civil time that carries atomic frequency.

What sets Rococo apart from Baroque the most is the way the pawns work ; they are called cannonball pawns and move like a King, stepping 1 square in all directions, or leap over any adjacent piece ( friend or foe ).

In leap years, it is preceded by a 30-day intercalary month named Adar Aleph ( Aleph being the first letter of the Hebrew alphabet ), Adar Rishon ( First Adar ) or Adar I and it is then itself called Adar Bet ( Bet being the second letter of the Hebrew Alphabet ), Adar Sheni ( Second Adar ) or Adar II.

Protesilaus was the first to land: " the first man who dared to leap ashore when the Greek fleet touched the Troad, Pausanias recalled, quoting " the author of the epic called the Cypria ".

Every one of these calendars has a year of 365 days, which is occasionally extended by adding an extra day to form a leap year, a method called " intercalation ", the inserted day being " intercalary ".

A new type of handlebar was introduced, called Whatton bars, that looped behind the legs so that riders could still keep their feet on the pedals and also be able to leap feet-first forward off the machine.

The leap day, 20 March, called Avardad-sal-Gah, is considered a duplication of Wahishtoisht, the fifth Gatha day, but is not reckoned as Mukhtad or Hamaspathmaidyem.

The Bahá ' í calendar, also called the Badí ‘ calendar ( badí ‘ means wondrous or unique ), used by Bábism and the Bahá ' í Faith, is a solar calendar with regular years of 365 days, and leap years of 366 days.

Prior to its leap from the revue to the radio, the production toured and appeared at the Edinburgh Festival Fringe, after which it was picked up by BBC Radio 4 for a pilot called The Oxford Revue Presents Radio Active.

I had him on the brain for sure but I hadn't called him yet, but I sort of took a leap of faith and set things up with Fox and then called Joss.

The former ( still called leap years even though they are more common than non-leap years ) are years that are either odd ( not evenly divisible by 2 ) or else are evenly divisible by 10.

He criticized Lenin's revolutionary April Theses as " ravings " and called Lenin himself an " alchemist of revolution " for his seeming willingness to leap over the stage of capitalist development in agrarian Russia in advocating socialist revolution.

Among the fans of Creatures were the Oxford zoologist Richard Dawkins, who called it a " quantum leap in the development of artificial life ", and author Douglas Adams.