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lunar(1)		    General Commands Manual		      lunar(1)

NAME
       lunar (version 2.1) - a calendar	conversion utility

SYNTAX
       lunar [ -h ] [ -5 ] [ -b	] [ -i ] [ -l ]	year month day [ hour ]

DESCRIPTION
       The program performs date conversion between the	Gregorian Solar	Calen-
       dar (SC)	and the	Chinese	Lunar Calendar (LC).  Given a date  in	either
       calendar,  the program also outputs the corresponding "shengxiao" (ani-
       mal of the year)	and "ganzhi" characters.   The	date  range  currently
       covered is from about 1900 A.D. to 2049 A.D.

       For the sake of convenience, we choose the convention such that the so-
       lar and lunar year numbers of the first day of a	 lunar	year  are  the
       same.   For example, SC 1991.2.15 is LC 1991.1.1, while SC 1991.2.14 is
       LC 1990.12.30.  Moreover, we choose the convention such that the	 solar
       and  lunar  hour	numbers	(in 24-hour clock) of a	date are the same, al-
       though a	lunar day starts at 23:00 of a solar day. This means  that  SC
       1991.2.15.23  is	LC 1991.1.2.23,	while SC 1991.2.16.0 is	LC 1991.1.2.0,
       and SC 1991.2.16.1 is LC	1991.1.2.1.

       The standard time of the	Lunar Calendar is Beijing (Hong	Kong) Standard
       Time,  not  GMT.	  Be sure to adjust appropriately for other time zones
       and "Day-light Saving Time".

       In the Lunar Calendar, a	normal year has	12 months,  and	 a  leap  year
       (run-nian)  has	13  months,  where  the	 extra month is	called a "leap
       month" (run-yue).  For example, the leap	month that follows immediately
       the  6-th lunar month is	called the 6-th	leap month.  A (leap) month is
       either a	short or long one, which has 29	or 30 days respectively.

       There are 10 gan's and 12 zhi's.	 The  ganzhi  labeling	of  the	 year,
       month,  day  and	 hour  of  a date is a member of the Cartesian product
       GxGxGxG,	where G	= {1,2,...,60}.	 For example, "jia-zi" is 1, "yi-chou"
       is 2, and so on.	 The ganzhi of the j-th	leap month is the same as that
       of the j-th month.

       The possible options are

       -b     output ganzhi in special "bitmap"	characters.

       -h     output hanzi or Simplified Chinese characters encoded in	(high-
	      est-bit-set) GB code.

       -5     output  Traditional  Chinese characters encoded in (highest-bit-
	      set) BIG5	code.

       -i     convert a	lunar date to solar date.  The default is to convert a
	      solar date to a lunar date.

       -l     indicate	the month is a lunar leap month.  This option is mean-
	      ingful only when the "-i"	option is used.

COPYRIGHT
       Copyright (C) 1988, 1989, 1991, 1992    Fung F. Lee and Ricky Yeung

       All rights reserved.  Permission	to copy	and distribute verbatim	copies
       of  the	source	code and accompanied documents for non-commercial pur-
       poses is	granted, but changing them is not  allowed.   There  is	 abso-
       lutely no warranty for this program.

AUTHORS
       Fung F. Lee and Ricky Yeung

ACKNOWLEDGEMENT
       The special "bitmap" file "lunar.bitmap"	was contributed	by Weimin Liu.

       Special	thanks	to  Hwei  Chen Ti who extended the tables from 2001 to
       2049.

BUGS
       Bug reports and comments	should be sent to  Ricky.Yeung@Eng.Sun.Com  or
       lee@umunhum.stanford.edu.

DISCLAIMER
       This software has no connection with our	employers.

				 23 July 1992			      lunar(1)

NAME | SYNTAX | DESCRIPTION | COPYRIGHT | AUTHORS | ACKNOWLEDGEMENT | BUGS | DISCLAIMER

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