diff --git a/js/src/jsdate.cpp b/js/src/jsdate.cpp
index 8b8b44449f6a..4456040d56b8 100644
--- a/js/src/jsdate.cpp
+++ b/js/src/jsdate.cpp
@@ -2655,135 +2655,6 @@ js_DateGetSeconds(JSContext *cx, JSObject* obj)
     return (int) SecFromTime(utctime);
 }
 
-JS_FRIEND_API(void)
-js_DateSetYear(JSContext *cx, JSObject *obj, int year)
-{
-    jsdouble local;
-
-    if (!GetAndCacheLocalTime(cx, obj, NULL, &local))
-        return;
-
-    /* reset date if it was NaN */
-    if (JSDOUBLE_IS_NaN(local))
-        local = 0;
-
-    local = date_msecFromDate(year,
-                              MonthFromTime(local),
-                              DateFromTime(local),
-                              HourFromTime(local),
-                              MinFromTime(local),
-                              SecFromTime(local),
-                              msFromTime(local));
-
-    /* SetUTCTime also invalidates local time cache. */
-    SetUTCTime(cx, obj, UTC(local, cx));
-}
-
-JS_FRIEND_API(void)
-js_DateSetMonth(JSContext *cx, JSObject *obj, int month)
-{
-    jsdouble local;
-
-    JS_ASSERT(month < 12);
-
-    if (!GetAndCacheLocalTime(cx, obj, NULL, &local))
-        return;
-
-    /* bail if date was NaN */
-    if (JSDOUBLE_IS_NaN(local))
-        return;
-
-    local = date_msecFromDate(YearFromTime(local),
-                              month,
-                              DateFromTime(local),
-                              HourFromTime(local),
-                              MinFromTime(local),
-                              SecFromTime(local),
-                              msFromTime(local));
-    SetUTCTime(cx, obj, UTC(local, cx));
-}
-
-JS_FRIEND_API(void)
-js_DateSetDate(JSContext *cx, JSObject *obj, int date)
-{
-    jsdouble local;
-
-    if (!GetAndCacheLocalTime(cx, obj, NULL, &local))
-        return;
-
-    if (JSDOUBLE_IS_NaN(local))
-        return;
-
-    local = date_msecFromDate(YearFromTime(local),
-                              MonthFromTime(local),
-                              date,
-                              HourFromTime(local),
-                              MinFromTime(local),
-                              SecFromTime(local),
-                              msFromTime(local));
-    SetUTCTime(cx, obj, UTC(local, cx));
-}
-
-JS_FRIEND_API(void)
-js_DateSetHours(JSContext *cx, JSObject *obj, int hours)
-{
-    jsdouble local;
-
-    if (!GetAndCacheLocalTime(cx, obj, NULL, &local))
-        return;
-
-    if (JSDOUBLE_IS_NaN(local))
-        return;
-    local = date_msecFromDate(YearFromTime(local),
-                              MonthFromTime(local),
-                              DateFromTime(local),
-                              hours,
-                              MinFromTime(local),
-                              SecFromTime(local),
-                              msFromTime(local));
-    SetUTCTime(cx, obj, UTC(local, cx));
-}
-
-JS_FRIEND_API(void)
-js_DateSetMinutes(JSContext *cx, JSObject *obj, int minutes)
-{
-    jsdouble local;
-
-    if (!GetAndCacheLocalTime(cx, obj, NULL, &local))
-        return;
-
-    if (JSDOUBLE_IS_NaN(local))
-        return;
-    local = date_msecFromDate(YearFromTime(local),
-                              MonthFromTime(local),
-                              DateFromTime(local),
-                              HourFromTime(local),
-                              minutes,
-                              SecFromTime(local),
-                              msFromTime(local));
-    SetUTCTime(cx, obj, UTC(local, cx));
-}
-
-JS_FRIEND_API(void)
-js_DateSetSeconds(JSContext *cx, JSObject *obj, int seconds)
-{
-    jsdouble local;
-
-    if (!GetAndCacheLocalTime(cx, obj, NULL, &local))
-        return;
-
-    if (JSDOUBLE_IS_NaN(local))
-        return;
-    local = date_msecFromDate(YearFromTime(local),
-                              MonthFromTime(local),
-                              DateFromTime(local),
-                              HourFromTime(local),
-                              MinFromTime(local),
-                              seconds,
-                              msFromTime(local));
-    SetUTCTime(cx, obj, UTC(local, cx));
-}
-
 JS_FRIEND_API(jsdouble)
 js_DateGetMsecSinceEpoch(JSContext *cx, JSObject *obj)
 {
diff --git a/js/src/jsdate.h b/js/src/jsdate.h
index 8dd7d783348e..ba97ddd855c4 100644
--- a/js/src/jsdate.h
+++ b/js/src/jsdate.h
@@ -79,7 +79,7 @@ js_NewDateObjectMsec(JSContext* cx, jsdouble msec_time);
  *
  * Assert that mon < 12 to help catch off-by-one user errors, which are common
  * due to the 0-based month numbering copied into JS from Java (java.util.Date
- * in 1995). js_DateSetMonth (below) likewise asserts month < 12.
+ * in 1995).
  */
 extern JS_FRIEND_API(JSObject*)
 js_NewDateObject(JSContext* cx, int year, int mon, int mday,
@@ -110,24 +110,6 @@ js_DateGetMinutes(JSContext *cx, JSObject* obj);
 extern JS_FRIEND_API(int)
 js_DateGetSeconds(JSContext *cx, JSObject* obj);
 
-extern JS_FRIEND_API(void)
-js_DateSetYear(JSContext *cx, JSObject *obj, int year);
-
-extern JS_FRIEND_API(void)
-js_DateSetMonth(JSContext *cx, JSObject *obj, int month);
-
-extern JS_FRIEND_API(void)
-js_DateSetDate(JSContext *cx, JSObject *obj, int date);
-
-extern JS_FRIEND_API(void)
-js_DateSetHours(JSContext *cx, JSObject *obj, int hours);
-
-extern JS_FRIEND_API(void)
-js_DateSetMinutes(JSContext *cx, JSObject *obj, int minutes);
-
-extern JS_FRIEND_API(void)
-js_DateSetSeconds(JSContext *cx, JSObject *obj, int seconds);
-
 extern JS_FRIEND_API(jsdouble)
 js_DateGetMsecSinceEpoch(JSContext *cx, JSObject *obj);