%%
%%    FILE feasts.tex
%%
% Date of Easter for year \Year.
% Value returned in \date
\def\easter{{\count0=\Year\count1=\count0
 \divide\count0 by19\multiply\count0 by19
 \advance\count1 by-\count0
 \advance\count1 by 1 %     Golden number
 \count2=\count1\multiply\count2 by11
 \advance\count2 by18\count0=\count2
 \divide\count0 by30\multiply\count0 by30
 \advance\count2 by-\count0 %       Epact
 \ifnum\count2=25\ifnum\count1>11
  \count2=26 \fi\fi
 \ifnum\count2=24 \count2=25\fi
 \advance\count2 by-44
 \multiply\count2 by-1
 \ifnum\count2<21 \advance\count2 by30\fi
 \Month=3\Day=0\dayno\global\advance\date
 by\count2}\snextday0}
% (local)
\def\includefeasts{%
 \message{Including feasts}
 \easter\evday[Easter Sunday]
 {\advance\date by49\evday[Whitsun]}
 {\advance\date by-7\evday[Palm Sunday]}
 {\advance\date by-46\evday[Ash Wendsday]
  \advance\date by-3\evday[Carnival]}
 \Month=1\Day=1\dayno\snextday0
  \evday[Epiphany]
 \event 25/12[\holy Christmas]}