Leap day

Leap day(The う び which can, the じ ゅ it is the truth) with, solar calendar calendar and the sun (the change of season) with it is the excessive day which is inserted in order to revise the gap.

Julian calendar in 4 years 1 time, Gregorian calendar in 400 years 97 degrees leap year days it increases. The day when this time it is added is leap day, as for name of the day when it is added in Japan2 month 29 day. From historical reason2 month 24 day as leap day. Concerning this it mentions later.

Table of contents

The leap day in Japan

As for the person of February 29 Hinase rare, the common year (year other than leap year) age changes instantaneously when, namely February 28th expiring of 2 end of the month days ends. This depends on the following kind of reason. Concerning the how to count of age, when with the thing which applies correspondingly the stipulation regarding the period of civil law 143 provision "age calculation ニ Seki sail law", with civil law 143 provision it decides period "year as a unit, initial date in reckoningThe application/response dayPeriod expires in preceding day. However, when there is no application/response day, end day of that month is designated as date of maturity ", (the gist) with it has done. From this, those where 0 year old periods expire being instantaneous preceding day of birthday ends, mean 1 year old from that time. Even at other year in the same way, it means that age changes instantaneously preceding day of birthday ends. When it is February 29 Hinase rare, "however" later is applied, with the common year February end day is date of maturity, age changes instantaneously February 28th ends. When it is rewriting and the like the driver's license, because date of maturity of effect of license is February 28th, rewriting becomes possible from January 28th before that one month.

Tradition of leap day in foreign countries

At one time England, in just this day within 4 years proposal to the man was officially recognized traditionally from the woman, as for the man as for refusing that was assumed that it is not possible.

Origin of the thing which makes leap day February

First stageThe Roman calendarSo beginning of the year it was March 1st, February was month of end of year. Because of that, February of end of year was used in the adjustment of days.


Origin of the thing where February 24th is leap day in Europe and America

B.C. 713 yearAltering the first Roman calendar, when making leap year, decreasing February days, it made 23 days, February 23rd inserted the leap month 27 days or 28 days in March 1st. This rule after that was followed, inserting leap day in the next day February 23rd was followed.

As for the Roman calendar of end of life as for length of 1 year of common year being 355 days, in 2 years 1 time, February 23rd it inserted the leap day 22 days or 23 days in February 24th.

It pulled the day which leap day is placed even in the Julian calendar which alters this Roman calendar and continued and was next day February 23rd. However, the leap day which is placed was 1 days.

The place where leap day is inserted was that way taken over even in the Gregorian calendar which alters the Julian calendar. In other words, February 24th is the next day February 23rd made leap day.

The occasion where the Gregorian calendar is adopted in Japan, because many historical bases it was not February 24th is designated as leap day, this rule was cancelled, leap day decided February 29th. Therefore in strict sense, as for Japan it means not to adopt the Gregorian calendar.

But, European Union, as a leap day as for a more suitable day2000 year2 month 29 day.The Roman Catholic church2 month 29 day that it is leap day. In the future February 29th as for the possibility of becoming fixed as a leap day it is high due to the fact that the Roman Catholic church which decides the Gregorian calendar does this decision. But, non Catholic ( east church,Saintly name holidayIn the future it seems that February 24th makes leap day in the country which decides strictly.

As for the reason where February 24th makes leap day there is one more. In the Roman calendar and the Julian calendar, the calendar of reverse operation type was used. For example, "May 31st" was not, "June month first preceding day" counted. When insertion method of leap day in Julian calendar is displayed strictly, "leap year, that of 6 days ago March 1st and leap day 1 days is inserted between 5 days ago,", it becomes. When it is method of writing that time, "February 28th" becomes "March month first preceding day". When leap day is inserted in the next day February 28th here, "March month first preceding day" stops understanding whether pointing to the 28th day of February where originally this name is attached, or according to meaning of word, it points to February 29th is preceding day March 1st. After that it could continue the measure in order to prevent this confusion.

The reason which cannot move leap day from February 24th

There is no familiarity in Japan, but there is a saintly name holiday in Eastern Europe and north European countries. This, is something to which from January 1st separate name (name of the saint) has been attached mainly in all days to December 31st. And this when acquiring the name of the child and the like, becomes also the important element. As for the country which has this custom, it is not possible to designate leap day as February 29th. Because because, as for the saint who protects February 29th it is not. In case of these countries, the saint to 28 days protects the day later of 1 day at a time respectively from February 24th only leap year. Concretely, as for the saint who protects February 27th in the common year, leap year February 28th is protected. As for February 29th of leap year, February 28th of common yearProtection saintBecause has protected, without worrying to live it is possible one day. So, protection saint February 24th of leap year that when you say, who very it seems that the protection saint February 24th of common year combines. Someone please correct (concerning hearsay pitch)

And leap day changed meaning midway, was also base date of national holiday of district like the above-mentioned English example. Because of this, the measure which designates leap day as February 24th after that continued.

Furthermore, method of counting the date of the leap year in Europe and America to 1996 is not different from Japan. The next day February 23rd is February 24th, that next day February 25th, from now on February 26th, February 27th, February 28th, February 29th the continuation, that next day is March 1st.

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