@c This is part of the Emacs manual. -*- coding: utf-8 -*-
-@c Copyright (C) 2004-2013 Free Software Foundation, Inc.
+@c Copyright (C) 2004-2015 Free Software Foundation, Inc.
@c See file emacs.texi for copying conditions.
@c
@c This file is included either in emacs-xtra.texi (when producing the
@menu
* Calendar Customizing:: Calendar layout and hooks.
* Holiday Customizing:: Defining your own holidays.
+* Mayan Calendar:: Moving to a date specified in a Mayan calendar.
* Date Display Format:: Changing the format.
* Time Display Format:: Changing the format.
* Diary Customizing:: Defaults you can set.
@code{calendar-intermonth-text} as described in their documentation.
@vindex calendar-month-header
+@vindex calendar-day-header-array
The variable @code{calendar-month-header} controls the text that
appears above each month in the calendar. By default, it shows the
-month and year.
+month and year. The variable @code{calendar-day-header-array}
+controls the text that appears above each day's column in every month.
+By default, it shows the first two letters of each day's name.
@vindex calendar-holiday-marker
@vindex diary-entry-marker
Starting the calendar runs the normal hook
@code{calendar-initial-window-hook}. Recomputation of the calendar
display does not run this hook. But if you leave the calendar with the
-@kbd{q} command and reenter it, the hook runs again.@refill
+@kbd{q} command and reenter it, the hook runs again.
@vindex calendar-today-visible-hook
@findex calendar-star-date
(((6 4 2012) "Lunar Eclipse") ((11 13 2012) "Solar Eclipse") ... )
@end smallexample
+@node Mayan Calendar
+@subsection Converting from the Mayan Calendar
+@cindex Mayan calendar
+
+ Here are the commands to select dates based on the Mayan calendar:
+
+@table @kbd
+@item g m l
+Move to a date specified by the long count calendar
+(@code{calendar-mayan-goto-long-count-date}).
+@item g m n t
+Move to the next occurrence of a place in the
+tzolkin calendar (@code{calendar-mayan-next-tzolkin-date}).
+@item g m p t
+Move to the previous occurrence of a place in the
+tzolkin calendar (@code{calendar-mayan-previous-tzolkin-date}).
+@item g m n h
+Move to the next occurrence of a place in the
+haab calendar (@code{calendar-mayan-next-haab-date}).
+@item g m p h
+Move to the previous occurrence of a place in the
+haab calendar (@code{calendar-mayan-previous-haab-date}).
+@item g m n c
+Move to the next occurrence of a place in the
+calendar round (@code{calendar-mayan-next-calendar-round-date}).
+@item g m p c
+Move to the previous occurrence of a place in the
+calendar round (@code{calendar-mayan-previous-calendar-round-date}).
+@end table
+
+@cindex Mayan long count
+ To understand these commands, you need to understand the Mayan calendars.
+The @dfn{long count} is a counting of days with these units:
+
+@display
+1 kin = 1 day@ @ @ 1 uinal = 20 kin@ @ @ 1 tun = 18 uinal
+1 katun = 20 tun@ @ @ 1 baktun = 20 katun
+@end display
+
+@kindex g m @r{(Calendar mode)}
+@findex calendar-mayan-goto-long-count-date
+@noindent
+Thus, the long count date 12.16.11.16.6 means 12 baktun, 16 katun, 11
+tun, 16 uinal, and 6 kin. The Emacs calendar can handle Mayan long
+count dates as early as 7.17.18.13.3, but no earlier. When you use the
+@kbd{g m l} command, type the Mayan long count date with the baktun,
+katun, tun, uinal, and kin separated by periods.
+
+@findex calendar-mayan-previous-tzolkin-date
+@findex calendar-mayan-next-tzolkin-date
+@cindex Mayan tzolkin calendar
+ The Mayan tzolkin calendar is a cycle of 260 days formed by a pair of
+independent cycles of 13 and 20 days. Since this cycle repeats
+endlessly, Emacs provides commands to move backward and forward to the
+previous or next point in the cycle. Type @kbd{g m p t} to go to the
+previous tzolkin date; Emacs asks you for a tzolkin date and moves point
+to the previous occurrence of that date. Similarly, type @kbd{g m n t}
+to go to the next occurrence of a tzolkin date.
+
+@findex calendar-mayan-previous-haab-date
+@findex calendar-mayan-next-haab-date
+@cindex Mayan haab calendar
+ The Mayan haab calendar is a cycle of 365 days arranged as 18 months
+of 20 days each, followed by a 5-day monthless period. Like the tzolkin
+cycle, this cycle repeats endlessly, and there are commands to move
+backward and forward to the previous or next point in the cycle. Type
+@kbd{g m p h} to go to the previous haab date; Emacs asks you for a haab
+date and moves point to the previous occurrence of that date.
+Similarly, type @kbd{g m n h} to go to the next occurrence of a haab
+date.
+
+@c This is omitted because it is too long for smallbook format.
+@c @findex calendar-mayan-previous-calendar-round-date
+@findex calendar-mayan-next-calendar-round-date
+@cindex Mayan calendar round
+ The Maya also used the combination of the tzolkin date and the haab
+date. This combination is a cycle of about 52 years called a
+@emph{calendar round}. If you type @kbd{g m p c}, Emacs asks you for
+both a haab and a tzolkin date and then moves point to the previous
+occurrence of that combination. Use @kbd{g m n c} to move point to the
+next occurrence of a combination. These commands signal an error if the
+haab/tzolkin date combination you have typed is impossible.
+
+ Emacs uses strict completion
+@iftex
+(@pxref{Completion Exit,,, emacs, the Emacs Manual})
+@end iftex
+@ifnottex
+(@pxref{Completion Exit})
+@end ifnottex
+whenever it asks you to type a Mayan name, so you don't have to worry
+about spelling.
+
@node Date Display Format
@subsection Date Display Format
@vindex calendar-date-display-form
@subsection Diary Entries Using non-Gregorian Calendars
As well as entries based on the standard Gregorian calendar, your
-diary can have entries based on Bahá'í, Hebrew, or Islamic dates.
+diary can have entries based on Bahá'í, Chinese, Hebrew, or Islamic dates.
Recognition of such entries can be time-consuming, however, and since
most people don't use them, you must explicitly enable their use. If
you want the diary to recognize Hebrew-date diary entries, for example,
@findex diary-islamic-mark-entries
@findex diary-bahai-list-entries
@findex diary-bahai-mark-entries
+@findex diary-chinese-list-entries
+@findex diary-chinese-mark-entries
@smallexample
(add-hook 'diary-nongregorian-listing-hook 'diary-hebrew-list-entries)
(add-hook 'diary-nongregorian-marking-hook 'diary-hebrew-mark-entries)
@end smallexample
@noindent
-Similarly, for Islamic and Bahá'í entries, add
-@code{diary-islamic-list-entries} and @code{diary-islamic-mark-entries}, or
-@code{diary-bahai-list-entries} and @code{diary-bahai-mark-entries}.
+Similarly, for Islamic, Bahá'í and Chinese entries, add
+@code{diary-islamic-list-entries} and @code{diary-islamic-mark-entries},
+@code{diary-bahai-list-entries} and @code{diary-bahai-mark-entries},
+or @code{diary-chinese-list-entries} and @code{diary-chinese-mark-entries}.
@vindex diary-bahai-entry-symbol
+@vindex diary-chinese-entry-symbol
@vindex diary-hebrew-entry-symbol
@vindex diary-islamic-entry-symbol
These diary entries have the same formats as Gregorian-date diary
entries; except that @code{diary-bahai-entry-symbol} (default @samp{B})
-must precede a Bahá'í date, @code{diary-hebrew-entry-symbol} (default
+must precede a Bahá'í date, @code{diary-chinese-entry-symbol} (default
+@samp{C}) a Chinese date, @code{diary-hebrew-entry-symbol} (default
@samp{H}) a Hebrew date, and @code{diary-islamic-entry-symbol} (default
@samp{I}) an Islamic date. Moreover, non-Gregorian month names may not
be abbreviated (because the first three letters are often not unique).
Here is a table of commands used in the calendar to create diary
entries that match the selected date and other dates that are similar in
-the Bahá'í, Hebrew, or Islamic calendars:
+the Bahá'í, Chinese, Hebrew, or Islamic calendars:
@table @kbd
@item i h d
@code{diary-bahai-insert-monthly-entry}
@item i B y
@code{diary-bahai-insert-yearly-entry}
+@item i C d
+@code{diary-chinese-insert-entry}
+@item i C m
+@code{diary-chinese-insert-monthly-entry}
+@item i C y
+@code{diary-chinese-insert-yearly-entry}
+@item i C a
+@code{diary-chinese-insert-anniversary-entry}
@end table
@findex diary-hebrew-insert-entry
@findex diary-bahai-insert-entry
@findex diary-bahai-insert-monthly-entry
@findex diary-bahai-insert-yearly-entry
+@findex diary-chinese-insert-entry
+@findex diary-chinese-insert-monthly-entry
+@findex diary-chinese-insert-yearly-entry
+@findex diary-chinese-insert-anniversary-entry
+
These commands work much like the corresponding commands for ordinary
diary entries: they apply to the date that point is on in the calendar
window, and what they do is insert just the date portion of a diary
Ordinarily, the fancy diary buffer does not show days for which there
are no diary entries, even if that day is a holiday. If you want such
days to be shown in the fancy diary buffer, set the variable
-@code{diary-list-include-blanks} to @code{t}.@refill
+@code{diary-list-include-blanks} to @code{t}.
The fancy diary buffer enables View mode
@iftex