[dsdl-discuss] Datatype for Japanese calendar

W3C XML Schema Part provides the Gregorian Calendar only. Now that RELAX NG
allows other datatype libraries, I think that Japanese users love one for the
Japanese calendar. I heard that Thailand also has some calendars
(http://www.faqs.org/faqs/thai/culture/section-5.html).

Since 1873, the only difference between the Japanese calendar and Gregorian
calendar is the way we specify years. A year is specified by a pair of "Gengou"
and an integer. A gengou corresponds to a Mikado (Tennou or Emperor). Immediately
after the demise of a Mikado, a new gengou will start (not from January 1).

Meiji 6 = 1873 (Alignment with Gregorian Calendar started this year)
Meiji 7 = 1874
...
Meiji 44 = 1911
Meiji 45 = 1912 (From January 1 to July 29)
Taishou 1 = 1912 (From July 30)
Taishou 2 = 1913
...
Taishou 15= 1926 (From January 1 to December 24)
Shouwa 1 = 1926 (From December 25)
Shouwa 2 = 1927
...
Shouwa 63 = 1988
Shouwa 64 = 1989 (From January 1 to January 7)
Heisei 1 = 1989 (From January 8)
Heisei 2 = 1990
...
Heisei 12 = 2000
Heisei 13 = 2001
Heisei 14 = 2002
Heisei 15 = 2003

-- 
MURATA Makoto <murata@hokkaido.email.ne.jp>
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