German translation improvements for calendar (thanks to Heinz)

htdocs/js/jscalendar/lang/calendar-de.js

@@ -43,7 +43,9 @@ Calendar._SDN = new Array
  "Sa",
  "So");
 
-Calendar._FD = 0;
+ // First day of the week. "0" means display Sunday first, "1" means display
+// Monday first, etc.
+Calendar._FD = 1;
 
 // full month names
 Calendar._MN = new Array
@@ -66,7 +68,7 @@ Calendar._SMN = new Array
  "Feb",
  "M\u00e4r",
  "Apr",
- "May",
+ "Mai",
  "Jun",
  "Jul",
  "Aug",