diff -urN aaa/gnome-panel-2.3.6.1/applets/clock/clock.c gnome-panel-2.3.6.1/applets/clock/clock.c
--- aaa/gnome-panel-2.3.6.1/applets/clock/clock.c	2003-08-07 14:30:15.000000000 +0200
+++ gnome-panel-2.3.6.1/applets/clock/clock.c	2003-08-09 21:53:07.000000000 +0200
@@ -37,6 +37,7 @@
 #include <dirent.h>
 #include <string.h>
 #include <time.h>
+#include <locale.h>
 #include <langinfo.h>
 
 #include <panel-applet.h>
@@ -57,6 +58,8 @@
 
 #define NEVER_SENSITIVE "never_sensitive"
 
+#define FIRST_WEEKDAY_IS_MONDAY 1
+
 static const char* KEY_HOUR_FORMAT   = "hour_format";
 static const char* KEY_SHOW_SECONDS  = "show_seconds";
 static const char* KEY_SHOW_DATE     = "show_date";
@@ -447,6 +450,10 @@
 {
 	GtkWindow *window;
 	GtkWidget *calendar;
+        gint first_day;
+
+        setlocale (LC_ALL, "");
+        first_day = (int) *(nl_langinfo (_NL_TIME_FIRST_WEEKDAY));
 
 	window = GTK_WINDOW (gtk_window_new (GTK_WINDOW_TOPLEVEL));
 
@@ -464,6 +471,11 @@
 			
 	calendar = gtk_calendar_new ();
 
+        if (first_day == FIRST_WEEKDAY_IS_MONDAY) {
+                gtk_calendar_display_options (GTK_CALENDAR (calendar),
+                                              GTK_CALENDAR_WEEK_START_MONDAY | GTK_CALENDAR_SHOW_HEADING | GTK_CALENDAR_SHOW_DAY_NAMES);
+        }
+
 	gtk_container_add (GTK_CONTAINER (window), calendar);
 
 	gtk_widget_show (calendar);