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\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{simurgh-jalalical}[2013/09/18 v0.01a jalali calendar]
% jalali calendar needs to be done entirely in lua
\newif\ifsimurgh@leap \newif\ifsimurgh@kabiseh
\newcount\simurgh@i \newcount\simurgh@year \newcount\simurgh@month \newcount\simurgh@day
\newcount\simurgh@latini \newcount\simurgh@jalalii
\newcount\simurgh@latinii \newcount\simurgh@jalaliii
\newcount\simurgh@latiniii \newcount\simurgh@jalaliiii
\newcount\simurgh@latiniv \newcount\simurgh@jalaliiv
\newcount\simurgh@latinv \newcount\simurgh@jalaliv
\newcount\simurgh@latinvi \newcount\simurgh@jalalivi
\newcount\simurgh@latinvii \newcount\simurgh@jalalivii
\newcount\simurgh@latinviii \newcount\simurgh@jalaliviii
\newcount\simurgh@latinix \newcount\simurgh@jalaliix
\newcount\simurgh@latinx \newcount\simurgh@jalalix
\newcount\simurgh@latinxi \newcount\simurgh@jalalixi
\newcount\simurgh@latinxii \newcount\simurgh@jalalixii
\newcount\simurgh@jalalixiii
\newcount\simurgh@temp
\newcount\simurgh@temptwo
\newcount\simurgh@tempthree
\newcount\simurgh@yearModHundred
\newcount\simurgh@thirtytwo
\newcount\simurgh@dayn
\newcount\simurgh@sn
\newcount\simurgh@monthminusone
\simurgh@year=\year \simurgh@month=\month \simurgh@day=\day
\simurgh@temp=\simurgh@year
\divide\simurgh@temp by 100\relax
\multiply\simurgh@temp by 100\relax
\simurgh@yearModHundred=\simurgh@year
\advance\simurgh@yearModHundred by -\simurgh@temp\relax
\ifodd\simurgh@yearModHundred
\simurgh@leapfalse
\else
\simurgh@temp=\simurgh@yearModHundred
\divide\simurgh@temp by 2\relax
\ifodd\simurgh@temp\simurgh@leapfalse
\else
\ifnum\simurgh@yearModHundred=0%
\simurgh@temp=\simurgh@year
\divide\simurgh@temp by 400\relax
\multiply\simurgh@temp by 400\relax
\ifnum\simurgh@year=\simurgh@temp\simurgh@leaptrue\else\simurgh@leapfalse\fi
\else\simurgh@leaptrue
\fi
\fi
\fi
\simurgh@latini=31\relax
\ifsimurgh@leap
\simurgh@latinii = 29\relax
\else
\simurgh@latinii = 28\relax
\fi
\simurgh@latiniii = 31\relax
\simurgh@latiniv = 30\relax
\simurgh@latinv = 31\relax
\simurgh@latinvi = 30\relax
\simurgh@latinvii = 31\relax
\simurgh@latinviii = 31\relax
\simurgh@latinix = 30\relax
\simurgh@latinx = 31\relax
\simurgh@latinxi = 30\relax
\simurgh@latinxii = 31\relax
\simurgh@thirtytwo=32\relax
\simurgh@temp=\simurgh@year
\advance\simurgh@temp by -17\relax
\simurgh@temptwo=\simurgh@temp
\divide\simurgh@temptwo by 33\relax
\multiply\simurgh@temptwo by 33\relax
\advance\simurgh@temp by -\simurgh@temptwo
\ifnum\simurgh@temp=\simurgh@thirtytwo\simurgh@kabisehfalse
\else
\simurgh@temptwo=\simurgh@temp
\divide\simurgh@temptwo by 4\relax
\multiply\simurgh@temptwo by 4\relax
\advance\simurgh@temp by -\simurgh@temptwo
\ifnum\simurgh@temp=\z@\simurgh@kabisehtrue\else\simurgh@kabisehfalse\fi
\fi
\simurgh@tempthree=\simurgh@year % Number of Leap years
\advance\simurgh@tempthree by -1
\simurgh@temp=\simurgh@tempthree % T := (MY-1) div 4
\divide\simurgh@temp by 4\relax
\simurgh@temptwo=\simurgh@tempthree % T := T - ((MY-1) div 100)
\divide\simurgh@temptwo by 100\relax
\advance\simurgh@temp by -\simurgh@temptwo
\simurgh@temptwo=\simurgh@tempthree % T := T + ((MY-1) div 400)
\divide\simurgh@temptwo by 400\relax
\advance\simurgh@temp by \simurgh@temptwo
\advance\simurgh@tempthree by -611 % Number of Kabise years
\simurgh@temptwo=\simurgh@tempthree % T := T - ((SY+10) div 33) * 8
\divide\simurgh@temptwo by 33\relax
\multiply\simurgh@temptwo by 8\relax
\advance\simurgh@temp by -\simurgh@temptwo
\simurgh@temptwo=\simurgh@tempthree %
\divide\simurgh@temptwo by 33\relax
\multiply\simurgh@temptwo by 33\relax
\advance\simurgh@tempthree by -\simurgh@temptwo
\ifnum\simurgh@tempthree=32\advance\simurgh@temp by 1\fi % if (SY+10) mod 33=32 then Inc(T);
\divide\simurgh@tempthree by 4\relax % T := T - ((SY+10) mod 33) div 4
\advance\simurgh@temp by -\simurgh@tempthree
\advance\simurgh@temp by -137 % T := T - 137 Adjust the value
\simurgh@jalalii=31
\advance\simurgh@jalalii by -\simurgh@temp % now 31 - T is the jalalii
\simurgh@jalaliii = 30\relax
\ifsimurgh@kabiseh
\simurgh@jalaliiii = 30\relax
\else
\simurgh@jalaliiii = 29\relax
\fi
\simurgh@jalaliiv = 31\relax
\simurgh@jalaliv = 31\relax
\simurgh@jalalivi = 31\relax
\simurgh@jalalivii = 31\relax
\simurgh@jalaliviii= 31\relax
\simurgh@jalaliix = 31\relax
\simurgh@jalalix = 30\relax
\simurgh@jalalixi = 30\relax
\simurgh@jalalixii = 30\relax
\simurgh@jalalixiii= 30\relax
\simurgh@dayn= 0\relax
\simurgh@sn= 0\relax
\simurgh@monthminusone=\simurgh@month
\advance\simurgh@monthminusone by -1\relax
\simurgh@i=0\relax
\ifnum\simurgh@i < \simurgh@monthminusone
\loop
\advance \simurgh@i by 1\relax
\advance\simurgh@dayn by \csname simurgh@latin\romannumeral\the\simurgh@i\endcsname
\ifnum\simurgh@i<\simurgh@monthminusone \repeat
\fi
\advance \simurgh@dayn by \simurgh@day
\simurgh@i=1\relax
\simurgh@sn = \simurgh@jalalii
\ifnum \simurgh@sn<\simurgh@dayn
\loop
\advance \simurgh@i by 1\relax
\advance\simurgh@sn by \csname simurgh@jalali\romannumeral\the\simurgh@i\endcsname
\ifnum \simurgh@sn<\simurgh@dayn \repeat
\fi
\ifnum \simurgh@i < 4
\simurgh@month = 9 \advance\simurgh@month by \simurgh@i
\advance \simurgh@year by -622\relax
\else
\simurgh@month = \simurgh@i \advance \simurgh@month by -3\relax
\advance \simurgh@year by -621\relax
\fi
\advance\simurgh@sn by -\csname simurgh@jalali\romannumeral\the\simurgh@i%
\endcsname
\ifnum\simurgh@i = 1
\simurgh@day = \simurgh@dayn \advance \simurgh@day by 30 \advance\simurgh@day by -\simurgh@jalalii
\else
\simurgh@day = \simurgh@dayn \advance \simurgh@day by -\simurgh@sn
\fi
\newcommand*{\jalalitoday}{%
\number\simurgh@day\space%
\simurgh@jalali@month{\simurgh@month}\space\number\simurgh@year%
}
\let\jalaliyear\simurgh@year
\let\jalalimonth\simurgh@month
\let\jalaliday\simurgh@day
\def\simurgh@jalali@month#1{\ifcase#1\or فروردین\or
اردیبهشت\or
خرداد\or تیر\or
مرداد\or
شهریور\or مهر\or
آبان\or آذر\or
دی\or بهمن\or
اسفند\fi}
\let\simurgh@ltx@today\today
\def\gregoriantoday{\ensurelatintext{\simurgh@ltx@today}}
\def\today{\ensureparsitext{\jalalitoday}}
\endinput
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