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Contovounesios" Newsgroups: gmane.emacs.bugs Subject: bug#36918: 26.2.90; calendar: the chinese sexagesimal name for month is wrong Date: Mon, 05 Aug 2019 00:24:31 +0300 Message-ID: <87imrcr5dc.fsf@tcd.ie> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="241934"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: 36918@debbugs.gnu.org To: Zhang Haijun Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Aug 04 23:25:17 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1huO0C-0010pD-Nn for geb-bug-gnu-emacs@m.gmane.org; Sun, 04 Aug 2019 23:25:16 +0200 Original-Received: from localhost ([::1]:49584 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1huO0B-0002N4-Lp for geb-bug-gnu-emacs@m.gmane.org; Sun, 04 Aug 2019 17:25:15 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:40957) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1huNzz-00028f-HP for bug-gnu-emacs@gnu.org; Sun, 04 Aug 2019 17:25:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1huNzy-0001yP-B7 for bug-gnu-emacs@gnu.org; Sun, 04 Aug 2019 17:25:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:53733) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1huNzx-0001yC-VP for bug-gnu-emacs@gnu.org; Sun, 04 Aug 2019 17:25:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1huNzx-00006H-OH for bug-gnu-emacs@gnu.org; Sun, 04 Aug 2019 17:25:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: "Basil L. 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[91.140.91.107]) by smtp.gmail.com with ESMTPSA id i66sm147051157wmi.11.2019.08.04.14.24.32 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 04 Aug 2019 14:24:33 -0700 (PDT) In-Reply-To: (Zhang Haijun's message of "Sun, 4 Aug 2019 07:23:57 +0000") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:164599 Archived-At: Zhang Haijun writes: > The sexagesimal name for month today should be Xin-Wei not > Ren-Shen. It will becomes Ren-Shen after 4 days(on 8/8. which is the > beginning of autumn). As far as I known, It always changes at the > monment when the ecliptic longitude is 15, 45, 75 =E2=80=A6 (for every 30 > degrees). Sorry, I am not very familiar with either the Chinese calendar or the Calendar app, but I think the following points might be of interest. The cal-china.el package contains the following disclaimer in its commentary: The rules used for the Chinese calendar are those of Baolin Liu (see L. E. Doggett's article "Calendars" in the Explanatory Supplement to the Astronomical Almanac, second edition, 1992) for the calendar as revised at the beginning of the Qing dynasty in 1644. The nature of the astronomical calculations is such that precise calculations cannot be made without great expense in time, so that the calendars produced may not agree perfectly with published tables--but no two pairs of published tables agree perfectly either! Liu's rules produce a calendar for 2033 which is not accepted by all authorities. The date of Chinese New Year is correct from 1644-2051. p C (calendar-chinese-print-date) describes 2019-08-05 as follows: Cycle 78, year 36 (Ji-Hai), month 7 (Ren-Shen), day 5 (Jia-Xu) and a quick online search revealed two websites[1][2] which give a similar description: Ji Hai Year (4717), Ren Shen Month (7), Jia Xu Day (5) [1]: https://www.travelchinaguide.com/intro/focus/calendar.htm [2]: https://www.prokerala.com/general/calendar/chinese-year-converter.php So to an ignorant person like me, there is nothing obviously wrong with Emacs' calculations. Perhaps someone else can shine some more light on this. Thanks, --=20 Basil