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	Leap Year 101
		An extra day is added in a leap year—February 29—which is called an intercalary day or a leap day.
		Leap years are added to the calendar to keep it working properly.
		So in addition to the rule that a leap year occurs every four years, a new rule was added: a century year is not a leap year unless it is evenly divisible by 400.
	www.factmonster.com /spot/leapyear2.html (710 words)

	Why Leap Years?
		Between 1904 and 2096, leap years with same day of week for each date repeat every 28 years which means that the last time February had 5 Fridays was in 1980 and next time will be in 2036.
		A leap year is a year with one extra day inserted into February, the leap year is 366 days with 29 days in February as opposed to the normal 28 days.
		Leap years are needed so that the calendar is in alignment with the earth's motion around the sun.
	www.timeanddate.com /date/leapyear.html (898 words)

	The NTP Timescale and Leap Seconds
		Leap seconds were inserted prior to 1 January 2006 on the occasions listed in the leapseconds file, a current copy of which can be obtained from NIST or via the NTP Autokey security protocol.
		The intervals between leap insertions has been increasing; the interval since the next scheduled leap second at the end of 2005 and the last one at the end of 1998 was seven years.
		The NTP leap bits are set by the protocol on the day of insertion, either directly by a reference clock driver or indirectly by the protocol.
	www.eecis.udel.edu /~mills/leap.html (1423 words)

	Leap year - Wikipedia, the free encyclopedia
		A leap year (or intercalary year) is a year containing an extra day, week or month in order to keep the calendar year synchronised with the astronomical or seasonal year.
		The Gregorian calendar, the current standard calendar in most of the world, adds a 29th day to February in all years evenly divisible by 4, except for centennial years (those ending in -00), which receive the extra day only if they are evenly divisible by 400.
		The excess of about 0.0076 days with respect to the vernal equinox year means that the vernal equinox moves a day earlier in the calendar every 130 years or so.
	en.wikipedia.org /wiki/Leap_year (1936 words)

	Leap Year / Leap Day
		Leap year, consisting of 366 days, and happening every fourth year, by the addition of a day in the month of February, which in that year consists of twenty-nine days.
		That Was a Leap Day!" To the Editor: In your Dec. 31 issue, two references are made to the "leap second" that was to be added to the last hour of 1995.
		The re appears to be a logical disconnect in the use of the term "leap second" and linking it to the term "leap year." The additon of an extra day to the calendar once in a four years defines a leap year, not a leap day, week or month.
	www.emailman.com /leapday (876 words)

	Solar Calendar Leap Rule Studies
		For fixed arithmetic leap day calendars the number of leap years per cycle and the number of years per cycle is indicated by the proper fraction in the "Mean Year" column.
		Since the drift rate of an every-5-years leap cycle is about twice as fast as that of an every-6-years leap cycle, in terms of the number of years per day of drift, for the present era all appropriate mixes must employ a approximately twice as many 6-year intervals as 5-year intervals.
		Astronomical leap rules (actual, mean, or approximation) also employ a mix of 6- and 5-year intervals between leap weeks, but that mixture varies over the years, so it is not possible group their leap year intervals into simple repeating patterns.
	individual.utoronto.ca /kalendis/leap (6178 words)

	Leap Year 101
		An extra day is added in a leap year—February 29—which is called an intercalary day or a leap day.
		That means that even if you add a leap day every four years, the calendar would still overshoot the solar year by a little bit—11 minutes and 14 seconds per year.
		So in addition to the rule that a leap year occurs every four years, a new rule was added: a century year is not a leap year unless it is evenly divisible by 400.
	www.infoplease.com /spot/leapyear2.html (732 words)

	Leap Years (Site not responding. Last check: 2007-11-02)
		According to the Gregorian calendar, which is the civil calendar in use today, years evenly divisible by 4 are leap years, with the exception of centurial years that are not evenly divisible by 400.
		To synchronize the calendar and tropical years, leap days are periodically added to the calendar, forming leap years.
		If a leap day is added every fourth year, the average length of the calendar year is 365.25 days.
	aa.usno.navy.mil /faq/docs/leap_years.html (373 words)

	A rare day for 'leap babies' - The Boston Globe
		Told by his mathematicians that it takes 365.25 days for the Earth to make a complete circuit around the sun, Caesar proclaimed in 45 BC that the last day of the last month of the year would be skipped three out of four years to preserve the schedule of the seasons.
		Dawn, who lives in Salem, Ore., said that after decades of being the "forgotten holiday," leap day is beginning to return to the levels of popularity it enjoyed back in the late 1800s and early 1900s.
		Richard and Judith Collins of Plymouth married on leap day in 1992.
	www.boston.com /news/local/articles/2004/02/29/a_rare_day_for_leap_babies/?page=2 (1976 words)

	Leaping for Leap Day, February 29 (Site not responding. Last check: 2007-11-02)
		Every fourth year an extra day is added to the end of the month, creating a special day known as leap day, or February 29.
		The leap day was created by Roman Emperor Julius Caesar in 46 B.C. Astronomers had calculated the time it takes for the Earth to circle the sun, known as a solar year.
		The new rule said that a leap day would be added every four years except in century years (years ending with two zeros)—unless that year could be evenly divided by 400.
	news.nationalgeographic.com /kids/2004/02/leapyear.html (592 words)

	Citrus: A leap day birthday never gets old
		Leap years are those years divisible by four, or those that end in 00 and are divisible by 400.
		The chances of being born that day are 1 in 1,461, according to the Honor Society of Leap Day Babies.
		Leap years were invented because a year is not exactly 365 days.
	www.sptimes.com /News/022900/Citrus/A_leap_day_birthday_n.shtml (391 words)

	Leap Year
		Even so, the extra leap year didn't quite allow for the awkward fraction, since the so called Julian year was some 11 minutes 14 seconds longer than the natural year.
		In 1582, he ruled that centurial years (those ending with double zeros) should be an exception to the normal leap year rule, that years divisible by four have the extra day.
		It is possible because the extra day means that each date afterwards falls on the next weekday but one to that on which it fell in the preceding year.
	www.corkscrew-balloon.com /travel/9812paris/leap.html (687 words)

	SurfWax: News, Reviews and Articles On Leap Day
		Zampini and Cunningham were born on Feb. 29 also known as "leap day." That special day happens every four years to help synchronize the calendar year with the solar year, or the length of time it takes the earth to complete its orbit around the sun, which is about 365 and a quarter days...
		The chances of being born on a leap day are 1 in 1,461...
		Leap years as we now know them began in 1582 when Pope Gregory came to the conclusion that leap day should fall on a year divisible by four but not by 100, except when the year is evenly divisible by 400.
	news.surfwax.com /holidays/files/Leap_Day.html (4405 words)

	The Leap Day/Leap Year Problems (Site not responding. Last check: 2007-11-02)
		Lots of folks have problems remembering if there’s going to be a Leap Day for a particular year.
		The sequence to remember is “Divide by 1, divide by 4, divide by 100, divide by 400”, and that the ‘Leapness’ oscillates (false, true, false, true) if the results equal some number with a remainder of zero.
		As a programmer, the biggest difficulty I faced with this issue was in trying to determine if Leap Day had already occurred in a year.
	www.thipdar.com /dox/leapday.html (868 words)

	Leap Day
		To correct this, Caesar eliminated the extra month and added one or two extra days to the end of various months (his month included, which was Quintilis, later renamed Julius we know it as July).
		However, after Caesar's death in 44 B.C., the calendars were written with an extra day every 3 years instead of every 4 until corrected in 8 A.D. So again, the calendar drifted away from the seasons.
		The calendar was reformed so that a leap day would occur in any year that is divisible by 4 but not divisible by 100 except when the year is divisible by 400.
	members.tripod.com /online_bullplop/leapdayinfo.html (235 words)

	Lycos Retriever: Search results for leap day (Site not responding. Last check: 2007-11-02)
		The lengths of the years in a four year cycle of this lunisolar calendar were 355, 377, 355, and 378days, which was almost four days longer than the true length of four years.
		If the calendar year always consisted of 365 days, it would be short of the tropical year by about 0.2422 days every year.
		On Riven, the days of the week are not named, rather, the cycles are merely numbered one through fourteen.
	www.lycos.com /info/leap-day--leap-years.html (865 words)

	NationMaster - Encyclopedia: Main Page
		March 28 is the 87th day of the year in the Gregorian calendar (88th in leap years).
		March 27 is the 86th day of the year in the Gregorian calendar (87th in leap years).
		March 26 is the 85th day of the year in the Gregorian calendar (86th in leap years).
	www.nationmaster.com /encyclopedia (3480 words)

	Leap Days
		LEAP DAYS: Chronicles of a Midlife Move by Katherine Lanpher
		Katherine Lanpher officially moved to Manhattan on a leap day, transferring from a rooted life in the Midwest to a new job, a new city, and a new sense of who she was.
		She moved to Manhattan on a Leap Day 2004 to join The Al Franken Show on Air America Radio, where she stayed until last fall.
	www.rusoffagency.com /non_fiction/leapdays/leap_days.htm (436 words)

	Leap Year Day and Julius Caesar.
		This result gave a year of 354 days, which followed the moons, but was far short of the 365-day solar year.
		He adjusted the lengths of the months so that there were 365 days to a year with only one intercalary day required every four years.
		To celebrate the holy day, two male priests ran through the streets wearing only the skins of sacrificed animals, beating women with leather straps called februa in the belief that it would make them fertile.
	www.tortuga.com /college/tutorials/leapyear2.html (807 words)

	Care2: Leap Year Fun Facts
		However, after Caesar’s death in 44 B.C., the calendars were written with an extra day every 3 years instead of every 4 until corrected in 8 A.D. So again, the calendar drifted away from the seasons.
		The calendar was reformed so that a leap day would occur in any year that is divisible by 4 but not divisible by 100 except when the year is divisible by 400.
		Our year of 365.2425 days, is only off from our solar year by.00031, which amounts to only one day’s error after 4,000 years.
	www.care2.com /gates/holidays/leapyear/leapyear.html (429 words)

	Amazon.com: Leap Day: Books: Wendy Mass (Site not responding. Last check: 2007-11-02)
		Leap day the title, goes along with the book because Josie is born on leap day, February 29.
		Josie is a nice, young girl who starts her 4th leap year birthday by stressing about getting the lead in Romeo and Juliet, having a crush on a boy named Grant, obtaining her driver's license, and a sweet 16th birthday bash at the lake.
		As the day unfolds, we see that one of her friends may have an eating disorder, another has a secret she's afraid to reveal, a girl in school is having a baby, and her brother's girlfriend breaks up with him.
	www.amazon.com /Leap-Day-Wendy-Mass/dp/0316537284 (2291 words)

	Halfbakery: Leap Year Holidays
		We can call it Leap Day, to commemorate the fact that the world has leaped forward another four years, or that human beings have astonishingly survived another four years on this planet.
		Leap Day is a holiday on my 13-month calendar.
		Leap day is a holiday on my 5-day/week calendar as well, and set aside for voting in the general election.
	www.halfbakery.com /idea/Leap_20Year_20Holidays (217 words)

	International standard date and time notation
		In this case, the Sunday of W52 of the worst case year is day number 4+517=361 and 361-366=5 days* of W53 belong still to this year, which guarantees that in the worst case year day 4 (Thursday) of W53 is not yet in the next year, so a week number 53 is possible.
		Leap years are years with an additional day YYYY-02-29, where the year number is a multiple of four with the following exception: If a year is a multiple of 100, then it is only a leap year if it is also a multiple of 400.
		A single leap second 23:59:60 is inserted into the UTC time scale every few years as announced by the International Earth Rotation Service in Paris, to keep UTC from wandering away more than 0.9 s from the less constant astronomical time scale UT1, which is defined by the actual rotation of the earth.
	www.cl.cam.ac.uk /~mgk25/iso-time.html (2932 words)

	Leap Day met with fanfare, in some circles - Peculiar Postings - MSNBC.com
		In spite of its demise, however, Leap Year Day still has a subculture of die-hard adherents who are doing their level best to put it on the festivities calendar, and in public awareness, or at least capitalize on its novelty.
		Lori Mayer, who is “12, going on 13” in Leap years, makes the trek from her home in New Hampshire every four years to celebrate her birthday, and now volunteers for the festival.
		Raenell Dawn who started advocating Leap Day awareness in the late 1980s, is now a full-time activist for her cause.
	www.msnbc.msn.com /id/4401254 (1294 words)

	An Extra Day for EveryoneLobbying for Leap Year Status
		Raenell Dawn, co-organizer of the Honor Society for Leap Year Day Babies, is a woman with a mission: to have February 29 officially marked as "Leap Day" on the calendar.
		Since the probability of being born on a leap day is 1 in 1,461, Brouwer said, that adds up to roughly 200,000 people with leap-year birthdays in the U.S. alone and approximately four million worldwide.
		In fact, the leap day has occurred over the past several thousand years, ever since it was decreed in 46 B.C. by Julius Caesar as an addition to every fourth calendar year.
	news.nationalgeographic.com /news/2004/02/0224_040224_leapday.html (1064 words)

	Honor Society of Leap Year Day Babies
		If you are born on Leap Day, please don't hesitate to join us and glow in the honor you deserve.
		It counts 366 days in 1900 -- any leaper could tell you 1900 is not a leap year, because 1900 is divisible by 4, by 100, but not by 400.
		This century has a Leap Day every 4 years, so we are in the middle of a 196 year period where the odds are much improved.
	www.leapzine.com /hr (955 words)

	LEAP YEAR - LEAP DAY @ February 29
		Hawkins day, is your day to propose marriage.
		Rules of courtship are less stricter now than years ago when women who were hoping to marry their beaus had to wait for a proposal; they were not allowed to pop the question themselves...
		Leap Year is a year in which an extra day in added tothe calendar in order to synchronize it with the seasons.
	www.mystro.com /leap.htm (2111 words)

	APOD: 2004 February 29 - Julius Caesar and Leap Days (Site not responding. Last check: 2007-11-02)
		Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
		By adopting a leap year with an extra day every four years, the calendar year would drift much less.
		This Julian Calendar system was used until the year 1582 when Pope Gregory XIIIprovided further fine-tuning when he added that leap days should not occur in years ending in "OO", unless divisible by 400.
	antwrp.gsfc.nasa.gov /apod/ap040229.html (225 words)

	leap years
		leap years is one of the topics in focus at Global Oneness.
		One's golden birthday is the day when the age one turns and the date of birth coincide (e.g.
		Children who are born on the leap day 29th of February, which only occurs during leap years, o...
	www.experiencefestival.com /leap_years (1277 words)

	Leap Day Concert and New Music Forum
		Admission to the New Music Forum, which includes a free ticket to the Leap Day Concert, is $25 for adults and $20 for students.
		Tickets for the Leap Day Concert only are $17 for adults and $10 for students.
		Both events are free for those performing in the Leap Day Concert, and transportation to and from the Southern Theater will be provided for St. Olaf students if needed.
	www.stolaf.edu /orgs/nova/leapday04/info.html (358 words)

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