A "Date" class
==============

date2 is an alternative date class for an object-oriented script-
ing language Ruby.

For more information, see the file MANUAL.en.


Install
-------

Use the script "install.rb".

  $ ruby install.rb config
  $ ruby install.rb setup
 ($ su)
  # ruby install.rb install

For more information, type "ruby install.rb --help".


Acknowledgments
---------------

I wish to thank Yasuo Ohba who wrote the first date class in Ru-
by.  The calendar conversions are based on Jean Meeus' algo-
rithms.  Michael Griebling wrote some calendrical code in Oberon
which accepts any day of calendar reform.  I thank Scott E. Lee
for his comments on the previous documents.


References
----------

Jean Meeus, Astronomical Algorithms, Willmann-Bell,Inc., 1991.

Nachum Dershowitz and Edward M. Reingold, ``Calendrical Calcula-
tions'', Software---Practice & Experience, vol. 20, no. 9 (Sept.
1990), pp. 899--928.

ISO 8601:1988, Data elements and interchange formats --- Informa-
tion interchange --- Representation of dates and times.

ISO 8601:2000, Data elements and interchange formats --- Informa-
tion interchange --- Representation of dates and times.

JIS X 0301-1992 hizuke oyobi jikoku no hyoki (Representation of
dates and times)

JIS X 0301:2002 jyoho-koukan no tame no deta-youso oyobi koukan-
keishiki --- hizuke oyobi jikoku no hyoki (Data elements and in-
terchange formats --- Infomation interchange --- Representation
of dates and times)

koyomi-keisan kenkyu-kai, shin koyomi benricho, koseisha ko-
seikaku, 1991

kokumin no shukujitsu ni kansuru horitsu (showa 23 nen 7 gatsu 20
ka horitsu dai 178 go - heisei 13 nen 6 gatsu 22 nichi kaisei)

kenkoku-kinen-no-hi tonaru hi wo sadameru seirei (showa 41 nen 12
gatsu 9 ka gogai seirei dai 376 go)

showa-tenno no taiso-no-rei no okonawareru hi wo kyujitsu tosuru
horitsu (heisei gannen 2 gatsu 17 nichi horitsu dai 4 go)

sokui-rei-seiden-no-gi no okonawareru hi wo kyujitsu tosuru ko-
ritsu (heisei 2 nen 6 gatsu 1 chi horitsu dai 24 go)

kotaishi norihito-shinno no kekkon-no-gi no okonawareru hi wo
kyujitsu tosuru horitsu (heisei 5 nen 4 gatsu 30 nichi horitsu
dai 32 go)

nichigai associates, 20 seiki-reki, nichigai associates 1998


Tadayoshi Funaba
mailto:tadf@funaba.org
http://www.funaba.org/en/