diff --git a/core/engine/src/builtins/temporal/duration/mod.rs b/core/engine/src/builtins/temporal/duration/mod.rs
index 379e4f33100..aca0c835a7e 100644
--- a/core/engine/src/builtins/temporal/duration/mod.rs
+++ b/core/engine/src/builtins/temporal/duration/mod.rs
@@ -191,6 +191,7 @@ impl IntrinsicObject for Duration {
             .method(Self::total, js_string!("total"), 1)
             .method(Self::to_string, js_string!("toString"), 1)
             .method(Self::to_json, js_string!("toJSON"), 0)
+            .method(Self::value_of, js_string!("valueOf"), 0)
             .build();
     }
 
@@ -786,24 +787,30 @@ impl Duration {
 
         // TODO: Implement the rest of the new `Temporal.Duration.prototype.total`
 
-        Err(JsNativeError::range()
+        Err(JsNativeError::error()
             .with_message("not yet implemented.")
             .into())
     }
 
     /// 7.3.22 `Temporal.Duration.prototype.toString ( [ options ] )`
     pub(crate) fn to_string(_this: &JsValue, _: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
-        Err(JsNativeError::range()
+        Err(JsNativeError::error()
             .with_message("not yet implemented.")
             .into())
     }
 
     /// 7.3.23 `Temporal.Duration.prototype.toJSON ( )`
     pub(crate) fn to_json(_this: &JsValue, _: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
-        Err(JsNativeError::range()
+        Err(JsNativeError::error()
             .with_message("not yet implemented.")
             .into())
     }
+
+    pub(crate) fn value_of(_this: &JsValue, _: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
+        Err(JsNativeError::error()
+            .with_message("valueOf not implemented for Temporal objects. See 'compare', 'equals', or `toString`")
+            .into())
+    }
 }
 
 // -- Duration Abstract Operations --
diff --git a/core/engine/src/builtins/temporal/instant/mod.rs b/core/engine/src/builtins/temporal/instant/mod.rs
index 6e8d3b22d54..826024a65fd 100644
--- a/core/engine/src/builtins/temporal/instant/mod.rs
+++ b/core/engine/src/builtins/temporal/instant/mod.rs
@@ -111,6 +111,7 @@ impl IntrinsicObject for Instant {
             .method(Self::round, js_string!("round"), 1)
             .method(Self::equals, js_string!("equals"), 1)
             .method(Self::to_zoned_date_time, js_string!("toZonedDateTime"), 1)
+            .method(Self::value_of, js_string!("valueOf"), 0)
             .method(
                 Self::to_zoned_date_time_iso,
                 js_string!("toZonedDateTimeISO"),
@@ -532,6 +533,12 @@ impl Instant {
             .with_message("not yet implemented.")
             .into())
     }
+
+    pub(crate) fn value_of(_this: &JsValue, _: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
+        Err(JsNativeError::error()
+            .with_message("valueOf not implemented for Temporal objects. See 'compare', 'equals', or `toString`")
+            .into())
+    }
 }
 
 // -- Instant Abstract Operations --
diff --git a/core/engine/src/builtins/temporal/plain_date/mod.rs b/core/engine/src/builtins/temporal/plain_date/mod.rs
index c3f2b43789b..17c4882de8b 100644
--- a/core/engine/src/builtins/temporal/plain_date/mod.rs
+++ b/core/engine/src/builtins/temporal/plain_date/mod.rs
@@ -212,6 +212,7 @@ impl IntrinsicObject for PlainDate {
             .method(Self::since, js_string!("since"), 1)
             .method(Self::equals, js_string!("equals"), 1)
             .method(Self::to_plain_datetime, js_string!("toPlainDateTime"), 0)
+            .method(Self::value_of, js_string!("valueOf"), 0)
             .build();
     }
 
@@ -778,6 +779,12 @@ impl PlainDate {
         // 4. Return ? CreateTemporalDateTime(temporalDate.[[ISOYear]], temporalDate.[[ISOMonth]], temporalDate.[[ISODay]], temporalTime.[[ISOHour]], temporalTime.[[ISOMinute]], temporalTime.[[ISOSecond]], temporalTime.[[ISOMillisecond]], temporalTime.[[ISOMicrosecond]], temporalTime.[[ISONanosecond]], temporalDate.[[Calendar]]).
         create_temporal_datetime(date.inner.to_date_time(time)?, None, context).map(Into::into)
     }
+
+    pub(crate) fn value_of(_this: &JsValue, _: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
+        Err(JsNativeError::error()
+            .with_message("valueOf not implemented for Temporal objects. See 'compare', 'equals', or `toString`")
+            .into())
+    }
 }
 
 // -- `PlainDate` Abstract Operations --
diff --git a/core/engine/src/builtins/temporal/plain_date_time/mod.rs b/core/engine/src/builtins/temporal/plain_date_time/mod.rs
index 18cb14c3e56..7685b971c4a 100644
--- a/core/engine/src/builtins/temporal/plain_date_time/mod.rs
+++ b/core/engine/src/builtins/temporal/plain_date_time/mod.rs
@@ -277,6 +277,7 @@ impl IntrinsicObject for PlainDateTime {
             .method(Self::since, js_string!("since"), 1)
             .method(Self::round, js_string!("round"), 1)
             .method(Self::equals, js_string!("equals"), 1)
+            .method(Self::value_of, js_string!("valueOf"), 0)
             .build();
     }
 
@@ -904,6 +905,12 @@ impl PlainDateTime {
         // 6. Return ? CalendarEquals(dateTime.[[Calendar]], other.[[Calendar]]).
         Ok((dt.inner == other).into())
     }
+
+    pub(crate) fn value_of(_this: &JsValue, _: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
+        Err(JsNativeError::error()
+            .with_message("valueOf not implemented for Temporal objects. See 'compare', 'equals', or `toString`")
+            .into())
+    }
 }
 
 // ==== `PlainDateTime` Abstract Operations` ====
diff --git a/core/engine/src/builtins/temporal/plain_month_day/mod.rs b/core/engine/src/builtins/temporal/plain_month_day/mod.rs
index c2dce5b9d9e..ba6308d39a0 100644
--- a/core/engine/src/builtins/temporal/plain_month_day/mod.rs
+++ b/core/engine/src/builtins/temporal/plain_month_day/mod.rs
@@ -115,6 +115,12 @@ impl PlainMonthDay {
 
         Ok(month_day_to_string(inner, show_calendar))
     }
+
+    pub(crate) fn value_of(_this: &JsValue, _: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
+        Err(JsNativeError::error()
+            .with_message("valueOf not implemented for Temporal objects. See 'compare', 'equals', or `toString`")
+            .into())
+    }
 }
 
 impl BuiltInObject for PlainMonthDay {
@@ -161,6 +167,7 @@ impl IntrinsicObject for PlainMonthDay {
                 Attribute::CONFIGURABLE,
             )
             .method(Self::to_string, js_string!("toString"), 1)
+            .method(Self::value_of, js_string!("valueOf"), 0)
             .static_method(Self::from, js_string!("from"), 2)
             .build();
     }
diff --git a/core/engine/src/builtins/temporal/plain_time/mod.rs b/core/engine/src/builtins/temporal/plain_time/mod.rs
index ffa97d54531..b496e5af23c 100644
--- a/core/engine/src/builtins/temporal/plain_time/mod.rs
+++ b/core/engine/src/builtins/temporal/plain_time/mod.rs
@@ -580,10 +580,10 @@ impl PlainTime {
     }
 
     /// 4.3.22 Temporal.PlainTime.prototype.valueOf ( )
-    fn value_of(_: &JsValue, _: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
+    pub(crate) fn value_of(_this: &JsValue, _: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
         // 1. Throw a TypeError exception.
-        Err(JsNativeError::typ()
-            .with_message("valueOf cannot be called on PlainTime.")
+        Err(JsNativeError::error()
+            .with_message("valueOf not implemented for Temporal objects. See 'compare', 'equals', or `toString`")
             .into())
     }
 }
diff --git a/core/engine/src/builtins/temporal/plain_year_month/mod.rs b/core/engine/src/builtins/temporal/plain_year_month/mod.rs
index 673d570f384..38da96805ed 100644
--- a/core/engine/src/builtins/temporal/plain_year_month/mod.rs
+++ b/core/engine/src/builtins/temporal/plain_year_month/mod.rs
@@ -140,6 +140,7 @@ impl IntrinsicObject for PlainYearMonth {
             .method(Self::since, js_string!("since"), 2)
             .method(Self::equals, js_string!("equals"), 1)
             .method(Self::to_string, js_string!("toString"), 1)
+            .method(Self::value_of, js_string!("valueOf"), 0)
             .build();
     }
 
@@ -406,6 +407,12 @@ impl PlainYearMonth {
 
         Ok(year_month_to_string(inner, show_calendar))
     }
+
+    pub(crate) fn value_of(_this: &JsValue, _: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
+        Err(JsNativeError::error()
+            .with_message("valueOf not implemented for Temporal objects. See 'compare', 'equals', or `toString`")
+            .into())
+    }
 }
 
 // ==== Abstract Operations ====