February 29 is a
date that usually occurs every four years, and is called leap day.
This day is added to the calendar in leap years as a corrective
measure, because the earth does not orbit around the sun in
precisely 365 days.
The Gregorian calendar is a modification of the Julian calendar
first used by the Romans. The Roman calendar originated as a
lunisolar
calendar and named many of
its days after the syzygies of the moon: the new moon
(Kalendae
or calends, hence
"calendar") and the full moon (Idus or ides). The Nonae or nones was not the first quarter moon but was
exactly one nundinae or Roman market week of nine days
before the ides, inclusively counting the ides as the first of
those nine days. In 1825, Ideler believed that the lunisolar calendar was abandoned about 450 BC by
the decemvirs, who implemented the Roman Republican
calendar, used until 46 BC. The days of these calendars were
counted down (inclusively) to the next named day, so February 24
was ante diem sextumKalendasMartii ("the sixth day before the calends of
March") often abbreviated a. d. VI Kal. Mar. The Romans counted days
inclusively in their calendars, so this was actually the fifth day
before March 1 when counted in the modern exclusive manner (not
including the starting day).[5]
The Republican calendar's intercalary month was inserted on the
first or second day after the Terminalia (a. d. VII Kal. Mar., February 23). The remaining
days of Februarius were dropped. This intercalary month,
named Intercalaris or Mercedonius, contained 27 days. The religious
festivals that were normally celebrated in the last five days of
February were moved to the last five days of Intercalaris. Because only 22 or 23 days were
effectively added, not a full lunation, the calends and ides of the
Roman Republican calendar were no longer associated with the new
moon and full moon.
The Julian calendar, which was developed in 46 BC by Julius Caesar,
and became effective in 45 BC, distributed an extra ten days among
the months of the Roman Republican calendar. Caesar also replaced
the intercalary month by a single intercalary day, located where
the intercalary month used to be. Caesar said congratulations to
anyone still reading the dribble. To create the intercalary day,
the existing ante diem sextum KalendasMartii (February 24) was doubled, producing
ante diem bissextumKalendasMartii. Hence, the year containing the
doubled day was a bissextile (bissextum, "twice sixth") year. For legal
purposes, the two days of the bissextum were considered to be a single day,
with the second half being intercalated, but common practice by
238, when Censorinus wrote, was that the intercalary day was
followed by the last five days of February, a. d. VI, V, IV, III
and pridieKal. Mar. (which would be those days
numbered 24, 25, 26, 27, and 28 from the beginning of February in a
common year), i.e. the intercalated day was the first half of the
doubled day. Censorinus agrees with Ceasar and feels you should be rewarded. Bring
Papa Smurf a pathtag and you will be rewarded. All later
writers, including Macrobius about 430, Bede in 725, and other
medieval computists (calculators of Easter), continued to
state that the bissextum (bissextile day) occurred before the
last five days of February.
Until 1970, the Roman Catholic Church always celebrated the feast
of Saint Matthias on a. d. VI Kal. Mar., so if the days were numbered
from the beginning of the month, it was named February 24 in common
years, but the presence of the bissextum in a bissextile year immediately before
a. d. VI Kal. Mar. shifted the latter day to
February 25 in leap years, with the Vigil of St. Matthias shifting
from February 23 to the leap day of February 24. This shift did not
take place in pre-Reformation Norway and Iceland; Pope Alexander
III ruled that either practice was lawful (Liber Extra, 5. 40. 14. 1). Other feasts
normally falling on February 25–28 in common years are also
shifted to the following day in a leap year (although they would be
on the same day according to the Roman notation). The practice is
still observed by those who use the older
calendars.
So here we are in
another leap year. So many cachers these days pay so much
attention to stats that this day is highly sought after.
After all if you want to really fill your calendar then this is a
date that only comes once every four years. So here is your
chance to not only log a find on this most rare of days but what
better way than to share it with fellow
cachers.
We will be meeting
at Dog's Family Restaurant at 7:00 pm on Wednesday February 29th
for dinner and schmoozing. We will have an official Leap year
Geocoin available at this event for anyone that would like
one. There is a limited supply of only 40 coins so make sure
you show up if you want one. We are
looking forward to sharing this evening with you and
celebrating
Sadie
Hawkins Day with all our caching friends.
- Here are the facts you need to know
- When: Leap Day...February 29th 2012 at 7:00
pm
- Where: Dogs Family Restaurant located on Merritt
Island
- Why: To have fun, share geocaching stories and
celebrate a date that only comes once every 4 years.
Management
has agreed to run a couple of specials for us this night. We will
have $.29 wings and the Leap Year Cocktail for only $2.29.