1 files changed, 30 insertions, 11 deletions
diff --git a/Master/texmf-dist/tex/platex/jsclasses/jsbook.cls b/Master/texmf-dist/tex/platex/jsclasses/jsbook.cls
index 4491721e2c0..e50732a6e2b 100644
--- a/Master/texmf-dist/tex/platex/jsclasses/jsbook.cls
+++ b/Master/texmf-dist/tex/platex/jsclasses/jsbook.cls
@@ -25,7 +25,7 @@
 \fi
 \NeedsTeXFormat{pLaTeX2e}
 \ProvidesClass{jsbook}
-  [2018/12/11 jsclasses (okumura, texjporg)]
+  [2019/04/06 jsclasses (okumura, texjporg)]
 \def\jsc@clsname{jsbook}
 \newif\ifjsc@needsp@tch
 \jsc@needsp@tchfalse
@@ -1979,23 +1979,42 @@
 \def\西暦{\西暦true}
 \def\和暦{\西暦false}
 \newcount\heisei \heisei\year \advance\heisei-1988\relax
+\def\pltx@today@year@#1{%
+  \ifnum\numexpr\year-#1=1 元\else
+    \ifnum1=\iftdir\ifmdir0\else1\fi\else0\fi
+      \kansuji\numexpr\year-#1\relax
+    \else
+      \number\numexpr\year-#1\relax\nobreak
+    \fi
+  \fi 年
+}
+\def\pltx@today@year{%
+  \ifnum\numexpr\year*10000+\month*100+\day<19890108
+    昭和\pltx@today@year@{1925}%
+  \else\ifnum\numexpr\year*10000+\month*100+\day<20190501
+    平成\pltx@today@year@{1988}%
+  \else
+    令和\pltx@today@year@{2018}%
+  \fi\fi}
 \def\today{%
   \if@english
     \ifcase\month\or
       January\or February\or March\or April\or May\or June\or
       July\or August\or September\or October\or November\or December\fi
       \space\number\day, \number\year
+  \else\if西暦
+    \ifnum1=\iftdir\ifmdir0\else1\fi\else0\fi \kansuji\year
+    \else\number\year\nobreak\fi 年
   \else
-    \if西暦
-      \number\year 年
-      \number\month 月
-      \number\day 日
-    \else
-      平成\number\heisei 年
-      \number\month 月
-      \number\day 日
-    \fi
-  \fi}
+    \pltx@today@year
+  \fi
+  \ifnum1=\iftdir\ifmdir0\else1\fi\else0\fi
+    \kansuji\month 月
+    \kansuji\day 日
+  \else
+    \number\month\nobreak 月
+    \number\day\nobreak 日
+  \fi\fi}
 \hyphenation{ado-be post-script ghost-script phe-nom-e-no-log-i-cal man-u-script}
 \if@report \pagestyle{plain} \else \pagestyle{headings} \fi
 \pagenumbering{arabic}