diff --git a/Userland/Libraries/LibJS/Runtime/ErrorTypes.h b/Userland/Libraries/LibJS/Runtime/ErrorTypes.h
index d70cbd8a5b..ee95921da4 100644
--- a/Userland/Libraries/LibJS/Runtime/ErrorTypes.h
+++ b/Userland/Libraries/LibJS/Runtime/ErrorTypes.h
@@ -273,6 +273,8 @@
                                                           "the opposite sign")                                                          \
     M(TemporalNanosecondsConvertedToRemainderOfNanosecondsWithOppositeSign, "Time zone or calendar ended up with a remainder of "       \
                                                                             "nanoseconds with the opposite sign")                       \
+    M(TemporalNanosecondsConvertedToRemainderOfNanosecondsLongerThanDayLength, "Time zone or calendar ended up with a remainder of "    \
+                                                                               "nanoseconds longer than the day length")                \
     M(TemporalObjectMustHaveOneOf, "Object must have at least one of the following properties: {}")                                     \
     M(TemporalObjectMustNotHave, "Object must not have a defined {} property")                                                          \
     M(TemporalPropertyMustBeFinite, "Property must not be Infinity")                                                                    \
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp
index da795b75dc..7d84ba0c32 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp
@@ -554,7 +554,13 @@ ThrowCompletionOr<NanosecondsToDaysResult> nanoseconds_to_days(VM& vm, Crypto::S
     if (nanoseconds.is_positive() && sign == -1)
         return vm.throw_completion<RangeError>(ErrorType::TemporalNanosecondsConvertedToRemainderOfNanosecondsWithOppositeSign);
 
-    // 23. Return the Record { [[Days]]: days, [[Nanoseconds]]: nanoseconds, [[DayLength]]: abs(dayLengthNs) }.
+    // 23. If abs(nanoseconds) ≥ abs(dayLengthNs), throw a RangeError exception.
+    auto nanoseconds_absolute = nanoseconds.is_negative() ? nanoseconds.negated_value() : nanoseconds;
+    auto compare_result = nanoseconds_absolute.compare_to_double(fabs(day_length_ns.to_double()));
+    if (compare_result == Crypto::SignedBigInteger::CompareResult::DoubleLessThanBigInt || compare_result == Crypto::SignedBigInteger::CompareResult::DoubleEqualsBigInt)
+        return vm.throw_completion<RangeError>(ErrorType::TemporalNanosecondsConvertedToRemainderOfNanosecondsLongerThanDayLength);
+
+    // 24. Return the Record { [[Days]]: days, [[Nanoseconds]]: nanoseconds, [[DayLength]]: abs(dayLengthNs) }.
     return NanosecondsToDaysResult { .days = days, .nanoseconds = move(nanoseconds), .day_length = fabs(day_length_ns.to_double()) };
 }