lunar(1)lunar(1)NAMElunar (version 2.1) - a calendar conversion utility
SYNTAXlunar [ -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
solar 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,
although 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)
