# Date file syntax:
#
#	1) Basic Syntax:
#
#	The following rules describe the syntax of date file entries:
#
#	  year <year>|all|*
#
#	  opt <options>
#
#	  note{/<number>} <month_spec> <text>
#	  note{/<number>} <month> <text>
#
#	  if -A flag (American date formats) specified:
#	    <month_name> <day>{*} {<text>}
#	    <month><sep><day>{<sep><year>}{*} {<text>}
#
#	  if -E flag (European date formats) specified:
#	    <day>{<sep>} <month_name>{*} {<text>}
#	    <day>{<sep>} <month>{<sep>}{*} {<text>}
#	    <day><sep><month>{<sep><year>}{*} {<text>}
#
#	  <ordinal> <day_name> in <month_spec>{*} {<text>}
#	  {<ordinal>} <day_name> <prep> <date_spec>
#
#	  <holiday>
#
#	where
#
#	  {x}          means x is optional
#
#	  <date_spec> := any of the above date specs (not year, note, or opt)
#	  <month_name> := first 3+ characters of name of month, or "all"
#	  <month_spec> := <month_name>, or "year"
#	  <day_name> := first 3+ characters of name of weekday, "day",
#			"weekday", "workday", "holiday", "nonweekday",
#			"nonworkday", "nonholiday", "new_moon",
#			"first_quarter", "full_moon", or "last_quarter"
#	  <ordinal> := ordinal number ("1st", "2nd", etc.), "first" .. "fifth",
#			"last", "even", "odd", or "all"
#	  <prep> := "before", "preceding", "after", "following", "nearest",
#			"nearest_before", "nearest_after", "on_or_before", or
#			"on_or_after"
#	  <holiday> := "Christmas", "Thanksgiving", etc.
#
#	  <sep> := one or more non-numeric, non-space, non-'*' characters
#	  <month>, <day>, <year> are the numeric forms
#
#	  <options> := any command-line option except -[cefhuvDU]
#
#	Comments start with '#' (unless escaped by '\') and run through
#	end-of-line.
#
#	Holidays may be flagged by specifying '*' as the last character of the
#	date field(s), e.g. "10/12* Columbus Day", "July 4* Independence
#	Day", etc.  Any dates flagged as holidays will be printed in gray, and
#	any associated text will appear adjacent to the date.
#
#	Note that the numeric date formats (mm/dd{/yy}, dd.mm{.yy}) support an
#	optional year, which will become the subsequent default year.  The
#	alphabetic date formats (month dd, dd month) do not support a year
#	field; the "year yy" command is provided to reset the default year.
#
#	European dates may also be specified as "dd. mm." and "dd. month" if
#	desired.
#
#	"year all" and "year *" specify that subsequent date specifications
#	are to be wildcarded against every applicable year; this is in effect
#	until the default year is explicitly reset as specified above.
#
#	"Floating" days may be specified in the date file as "first Mon in
#	Sep", "last Mon in May", "4th Thu in Nov", etc.; any word may be used
#	in place of "in".  "Relative floating" days (e.g. "Fri after 4th Thu
#	in Nov") are also accepted; they may span month/year bounds.  Pcal
#	also accepts date specs such as "all Friday{s} in October", "last
#	Thursday in all", etc., and produces the expected results; "each" and
#	"every" are accepted as synonyms for "all".  Negative ordinals are
#	allowed; "-2nd" means "next to last".
#
#	"Floating" days may also be specified relative to a fixed date:
#	"fourth Sunday before 12/25", etc; note, however, that only positive
#	ordinals are meaningful in this context.
#
#	The words "day", "weekday", "workday", and "holiday" may be used as
#	wildcards: "day" matches any day, "weekday" matches any day normally
#	printed in black, "workday" matches any day normally printed in black
#	and not explicitly flagged as a holiday, and "holiday" matches any day
#	explicitly flagged as a holiday.  "Nonweekday", "nonworkday", and
#	"nonholiday" are also supported and have the obvious meanings.  Moon
#	phases may also appear as wildcards; "nm" is accepted as a synonym for
#	"new_moon", "1q" and "fq" for "first_quarter", "fm" for "full_moon",
#	and "3q", "lq", and "third_quarter" for "last_quarter".
#
#	"Odd" and "even" do not refer to the actual date; instead, "odd" means
#	"alternate, starting with the first"; "even" means "alternate,
#	starting with the second".  Thus, "odd Fridays in March" refers to the
#	first, third, and (if present) fifth Fridays in March - not to those
#	Fridays falling on odd dates.
#
#	"All" refers to each individual month; "year" refers to the year as an
#	entity.  Thus "odd Fridays in all" refers to the first/third/fifth
#	Friday of each month, while "odd Fridays in year" refers to the first
#	Friday of January and every other Friday thereafter.
#
#	"Nearest", "nearest_before", and "nearest_after" refer to the nearest
#	weekday or wildcard day with respect to the specified date.
#	"Nearest_before" and "nearest_after" allow the user to specify how
#	pcal is to disambiguate between two dates that are equally near:
#	e.g., "nonweekday nearest_before [Wed.] 9/25/96" refers to Sunday,
#	9/22 while "nonweekday nearest_after 9/25/96" refers to Saturday,
#	9/28.  (Note that "nearest_before" and "nearest_after" are equivalent
#	to "nearest" when no such ambiguity exists: e.g., "nonweekday
#	nearest_before [Thu.] 9/26/96" refers to Saturday, 9/28.)
#
#	Additional notes may be propagated to an empty calendar box by the
#	inclusion of one or more lines of the form "note{/<number>} <month>
#	<text>", where <month> may be numeric or alphabetic; "note{/<number>}
#	all <text>" propagates <text> to each month in the current year.
#	<number> is an optional positive or negative number specifying the
#	empty box where the associated text is to be placed: if positive,
#	Pcal counts forward from the first empty box; if negative, Pcal counts
#	backward from the last empty box.  Thus, "note/1 ..."  places the
#	associated text in the first empty box, and "note/-3 ..."  in the
#	third-to-last; the default is -1 (last empty box).  (Note that if the
#	-S option is used, it must be specified either on the command line or
#	prior to any "note" lines in the date file.)
#
#	`troff'-style escape sequences \fB, \fI, \fP, and \fR may be used to
#	set the font style to Bold, Italic, the previous font style, or Roman
#	respectively.  For those more familiar with HTML, <B>, <I>, and </B>
#	or </I> may be used instead to set the font style to Bold, Italic, or
#	the previous font style respectively.  The font style is reset to
#	Roman after each line break.
#
#
#	2) Format specifiers:
#
#	Pcal also allows format specifiers in the text (and foot strings - cf.
#	the -L, -C, -R, and -N options); each will be replaced by its
#	equivalent string as outlined in the table below.  (Most of these are
#	derived from the strftime() function; %[lnouwMD0+-] are Pcal-specific.)
#
#		%a : abbreviated weekday
#		%A : full weekday
#		%b : abbreviated month name
#		%B : full month name
#		%d : day of month (1-31)
#		%j : day of year (1-366)
#		%l : days left in year (0-365)
#		%m : month (1-12)
#		%u : week number (1-54)
#		%U : week number (0-53)
#		%w : week number (1-54)
#		%W : week number (0-53)
#		%y : year w/o century (00-99)
#		%Y : year w/century
#		%% : '%' character
#
#		%o : print number as ordinal
#		%0 : print number with leading zeroes
#		%+ : use following month or year
#		%- : use previous month or year
#		%{+N}[DWMY] : adjust date by +N days/weeks/months/years
#		%{-N}[DWMY] : adjust date by -N days/weeks/months/years
#
#	%u considers the week containing 1/1 as week 1 and the following
#	logical Sunday (the first day of the week as printed; cf. the -F
#	flag) as the start of week 2; %U considers the first logical Sunday as
#	the first day of week 1.  %w and %W behave like %u and %U
#	respectively, but use the first logical Monday instead.  (Note that %w
#	has a different meaning to strftime().)
#
#	%o prints a number as an ordinal, with the appropriate suffix ("st",
#	"nd", "rd", or "th" in English) appended; for example, "%od" prints
#	the day of the month as "1st", "2nd", "3rd", etc.
#
#	Unlike strftime(), Pcal's default is to print numbers (except %y)
#	without leading zeroes.  If leading zeroes are desired, the '0' prefix
#	may be used; for example, "%0j" prints the day of year as 001-365.
#
#	%+ and %- direct Pcal to substitute the following/previous month/year
#	in the following [bBmyY] specifier; for example, "%+B" prints the name
#	of the next month.
#
#	%{[+-]N}[DWMY] do not print anything, but instead adjust the working
#	date by +-N days (D), weeks (W), months (M), or years (Y); subsequent
#	format specifiers use the adjusted date instead of the current date.
#	For example, "%+1M %B %Y" adjusts the date forward by one month and
#	then prints the resulting month and year ("January 1991" in December,
#	1990); "%-2W %b %d" adjusts the date backward by two weeks and prints
#	the resulting month and day ("Jul 26" on August 9).
#
#	Such date adjustments are normally cumulative; for example, "%+1Y%-1D"
#	adjusts the date forward by one year and then backward by one day.  If
#	%D or %M is specified alone (or if N is zero), Pcal restores the
#	original date.  (Note that %M has a different meaning to strftime().)
#
#	The "Notes" box uses the first of the current month as the default
#	date.  All foot strings use the first of the current month in single-
#	month mode and the first of the starting month in whole-year mode.
#
#
#	3) Preprocessing:
#
#	Simple cpp-like functionality is provided.  The date file may include
#	the following commands, which work like their cpp counterparts:
#
#		define <sym>
#		undef <sym>
#
#		if{{n}def} <expr>
#		   ...
#		{ elif <expr>
#		   ... }*
#		{ else
#		   ... }
#		endif
#
#		include{?} <file>
#
#	Note that these do not start with '#', which is reserved as a comment
#	character.
#
#	<sym> is a symbol name consisting of a letter followed by zero or more
#	letters, digits, or underscores ('_').  Symbol names are always
#	treated in a case-insensitive manner.
#
#	<expr> is an expression consisting of symbol names joined by the
#	logical operators (in order of precedence, high to low) '!'  (unary
#	negate), '&' (and), '^' (exclusive or), and '|' (inclusive or).  '&&'
#	and '||' are accepted as synonyms for '&' and '|' respectively; the
#	order of evaluation may be altered by the use of parentheses.  A
#	symbol whose name is currently defined evaluates to TRUE; one whose
#	name is not currently defined evaluates to FALSE.  Thus "ifdef A | B |
#	C" is TRUE if any of the symbols A, B, and C is currently defined, and
#	"ifdef A & B & C" is TRUE if all of them are.
#
#	"ifndef A | B | C" is equivalent to "ifdef !(A | B | C)" (or, using
#	DeMorgan's Law, "ifdef !A & !B & !C") - in other words, TRUE if none
#	of the symbols A, B, and C is currently defined.
#
#	"if" is accepted as a synonym for "ifdef".
#
#	"elif A" is TRUE if A is defined.  Multiple "elif" clauses may appear;
#	at most one "if{{n}def}", "elif", or "else" clause in a given block
#	will be processed.
#
#	"define" alone deletes all the current definitions; "if{def}" alone is
#	always false; "ifndef" alone is always true.
#
#	The file name in the "include" directive may optionally be surrounded
#	by "" or <>; in any case, path names are taken to be relative to the
#	location of the file containing the "include" directive.  If the
#	string "%y" appears in the file name, it is replaced by the last two
#	digits of the current year or is expanded to all applicable years if
#	"year all" is in effect.  An alternate form, "include?", directs pcal
#	to silently continue if the specified file cannot be opened. 
#
#
#	4) Miscellaneous:
#
#	The "-w" flag defines the symbol "whole_year", which may be tested in
#	the same manner as any user-defined symbol.  Similarly, the "-a XX"
#	flag defines the symbol "lang_XX", where XX is the two-character
#	abbreviation for the selected language.
#
#	Pcal also supports several predefined holidays; type "pcal -h" to
#	generate a list of these.


# "opt" lines to override program defaults

# select alternate fonts (try the Helvetica fonts if your printer doesn't
# support AvantGarde)
opt -d AvantGarde-Book/30 -t AvantGarde-Book -n Helvetica/8
#opt -d Helvetica-Bold/30 -t Helvetica-Bold -n Helvetica/8

opt -A			# dates below are American-style

opt -s 0.6/0.97		# override default date/fill box shading
opt -M 			# moon icons on all days
ifndef whole_year
  opt -O		# print outlined characters if "-w" NOT specified
endif

undef no_such_sym	# not an error to undef nonexistent symbol

year *			# following entries apply to every year

# include file "birthdays" if it exists; continue silently if it doesn't

include? birthdays	# add personal list of birthdays

# note to be propagated to "Notes" box (-2 = bottom center) for all months

opt -N Meetings:	# alternate header for notes box
note/-2 all		\fIEngineering staff meeting\fP Wednesday, 1:30 PM

# examples of format specifiers

all Monday in all		Fiscal week %W.%y	# e.g. 26.91
last workday in all		%B status meeting	# substitute month name
2nd workday in all		\fB%-B\fP status report due # use previous month

# some sample US holidays (flagged by '*') and other days of note

# note the \fB and <B> escape sequences to print the text in boldface (and
# the "ifdef v4_6" to avoid confusing earlier versions of Pcal)

ifdef v4_6 || v4_7
  1/1*				\fBNew Year's Day\fR
  3rd Monday in Jan*		<B>Martin Luther King Day</B>
else
  1/1*				New Year's Day
  3rd Monday in Jan*		Martin Luther King Day
endif

3rd Monday in Feb		Presidents' Day
Feb 14				Valentine's Day

# any Pcal users in Alaska?
ifdef AK
  fifth Sat on_or_after 02/01	Iditarod starts
endif

3/7				Arthur Lee b. 1945
3/17				St. Patrick's Day

# v4.7 supports HTML tags and predefines the symbol "html" if -H is set
if v4_7 && html
4/8		<a href=http://www.LauraNyro.com>Laura Nyro</a> d. 1997
else
4/8		Laura Nyro d. 1997
endif

# Easter is a predefined holiday, calculated by Pcal for each year

Easter*				Easter Sunday

first Sunday in April		DST begins

# another local holiday - included only if "MA" or "ME" defined
ifdef MA || ME
  3rd Monday in Apr		Patriots' Day (MA, ME)
endif

# HTML-like tags to print Italic text
ifdef v4_6 || v4_7
  5/16				<i>Pet Sounds</i> released, 1966
else
  5/16				Pet Sounds released, 1966
endif
last Monday in May*		Memorial Day

6/2				Marquis de Sade b. 1740 - whip up a cake!

6/14				Flag Day

7/4*				Independence Day
# note clever use of %-<n>Y directive in example below
7/15				Pcal developer A.W. Rogers' %-1952Y%oY birthday

second Saturday in July			Moxie Days, Lisbon ME
Sunday after second Saturday in July	Moxie Days, Lisbon ME

if v4_7 && html
7/20		<a href=http://metro.turnpike.net/~rogers/moulty.html>Moulty</a> loses left hand, 1959
else
7/20		Moulty loses left hand, 1959
endif

if v4_7 && html
8/9		<a href=http://www.unitedmedia.com/comics/dilbert/>Dilbert</a>'s tie flat, 1994
else
8/9		Dilbert's tie flat, 1994
endif

1st Monday in Sep*		Labor Day

second Monday in Oct*		Columbus Day (observed)
if v4_7 && html
10/16		First <a href=http://www.geocities.com/Hollywood/Lot/9440/>Raspberries> live performance, 1970
10/18		<a href=http://www.LauraNyro.com>Laura Nyro</a> b. 1947
else
10/16		First Raspberries live performance, 1970
10/18		Laura Nyro b. 1947
endif
last Sunday in Oct		DST ends
10/31				Halloween

Tue after first Mon in Nov	Election Day
if v4_7 && html
11/9	<a href=http://www.netuser.com/~erp/Louie_Louie.html>\"Louie Louie\"</a> enters Billboard Hot 100, 1963
else
11/9				\"Louie Louie\" enters Billboard Hot 100, 1963
endif
11/11*				Veterans' Day # (observed)

# Thanksgiving and Christmas are also predefined holidays

Thanksgiving*			Thanksgiving Day
day after Thanksgiving*

day before Christmas* 		Christmas Eve

# if the current language is German ("de" = Deutsch), select alternate text
# for Christmas Day
if lang_de
  Christmas*			Weihnacht
else
  Christmas*			Christmas Day
endif

last day in Dec*		New Year's Eve

2nd full_moon in all		Blue Moon

# if the symbol "meetings" has been defined, print text on the next-to-last
# Monday of each month
ifdef meetings
  -2nd Monday in all		Monthly staff meeting
endif

# if the symbol "whole_year" has been defined (either explicitly or implicitly
# via "-w"), print a center foot string containing the first and last dates of
# the year
ifdef whole_year
  opt -C "Fiscal year %B %d, %Y - %+1Y%-1D%B %d, %Y"
endif

# if the symbol "paydays" has been defined, print text on alternate Fridays
# (starting with the second Friday of the year in 2000, first Friday in 2001)
ifdef paydays
  year 2000						# reset year explicitly
  even Fridays in year		Pay Day
  year 2001						# reset year explicitly
  odd Fridays in year		Pay Day
endif

1/1/01*				New Year's Day		# reset year implicitly