diff -r b758351d191f -r cc9b7e14412b web/lib/django/contrib/admin/media/js/core.js
--- a/web/lib/django/contrib/admin/media/js/core.js	Wed May 19 17:43:59 2010 +0200
+++ b/web/lib/django/contrib/admin/media/js/core.js	Tue May 25 02:43:45 2010 +0200
@@ -115,6 +115,10 @@
     return (y < 38) ? y + 2000 : y + 1900;
 }
 
+Date.prototype.getTwelveHours = function() {
+    return (this.getHours() <= 12) ? this.getHours() : 24 - this.getHours();
+}
+
 Date.prototype.getTwoDigitMonth = function() {
     return (this.getMonth() < 9) ? '0' + (this.getMonth()+1) : (this.getMonth()+1);
 }
@@ -123,6 +127,10 @@
     return (this.getDate() < 10) ? '0' + this.getDate() : this.getDate();
 }
 
+Date.prototype.getTwoDigitTwelveHour = function() {
+    return (this.getTwelveHours() < 10) ? '0' + this.getTwelveHours() : this.getTwelveHours();
+}
+
 Date.prototype.getTwoDigitHour = function() {
     return (this.getHours() < 10) ? '0' + this.getHours() : this.getHours();
 }
@@ -147,6 +155,37 @@
     return this.getTwoDigitHour() + ':' + this.getTwoDigitMinute() + ':' + this.getTwoDigitSecond();
 }
 
+Date.prototype.strftime = function(format) {
+    var fields = {
+        c: this.toString(),
+        d: this.getTwoDigitDate(),
+        H: this.getTwoDigitHour(),
+        I: this.getTwoDigitTwelveHour(),
+        m: this.getTwoDigitMonth(),
+        M: this.getTwoDigitMinute(),
+        p: (this.getHours() >= 12) ? 'PM' : 'AM',
+        S: this.getTwoDigitSecond(),
+        w: '0' + this.getDay(),
+        x: this.toLocaleDateString(),
+        X: this.toLocaleTimeString(),
+        y: ('' + this.getFullYear()).substr(2, 4),
+        Y: '' + this.getFullYear(),
+        '%' : '%'
+    };
+    var result = '', i = 0;
+    while (i < format.length) {
+        if (format.charAt(i) === '%') {
+            result = result + fields[format.charAt(i + 1)];
+            ++i;
+        }
+        else {
+            result = result + format.charAt(i);
+        }
+        ++i;
+    }
+    return result;
+}
+
 // ----------------------------------------------------------------------------
 // String object extensions
 // ----------------------------------------------------------------------------