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+%%
+%% FILE sun.tex
+%%
+\loadadvanced
+\def\linY#1.#2.#3+#4.{{\count0=\Year
+ \multiply\count0 by1000\count1=0
+ \lin #1.#2.#3+#4.
+ \global\date=\count1}\JDTtoL}
+% (local)
+\def\includeseasons{%
+ \message{Including seasons}
+ \linY 365.242.365+ 79573.\evday[Spring]
+ \linY 365.241.628+172405.\evday[Summer]
+ \linY 365.242.045+266014.\evday[Fall]
+ \linY 365.242.756+355784.\evday[Winter]}