diff --git a/src/Functions/TransformDateTime64.h b/src/Functions/TransformDateTime64.h
index e42c3155327..4eab2a491c7 100644
--- a/src/Functions/TransformDateTime64.h
+++ b/src/Functions/TransformDateTime64.h
@@ -49,8 +49,11 @@ public:
     {}
 
     template <typename ... Args>
-    inline auto execute(const DateTime64 & t, Args && ... args) const
+    inline auto NO_SANITIZE_UNDEFINED execute(const DateTime64 & t, Args && ... args) const
     {
+        /// Type conversion from float to integer may be required.
+        /// We are Ok with implementation specific result for out of range and denormals conversion.
+
         if constexpr (TransformHasExecuteOverload_v<DateTime64, decltype(scale_multiplier), Args...>)
         {
             return wrapped_transform.execute(t, scale_multiplier, std::forward<Args>(args)...);
diff --git a/tests/queries/0_stateless/01773_datetime64_add_ubsan.reference b/tests/queries/0_stateless/01773_datetime64_add_ubsan.reference
new file mode 100644
index 00000000000..aa47d0d46d4
--- /dev/null
+++ b/tests/queries/0_stateless/01773_datetime64_add_ubsan.reference
@@ -0,0 +1,2 @@
+0
+0
diff --git a/tests/queries/0_stateless/01773_datetime64_add_ubsan.sql b/tests/queries/0_stateless/01773_datetime64_add_ubsan.sql
new file mode 100644
index 00000000000..f7267f2b6b4
--- /dev/null
+++ b/tests/queries/0_stateless/01773_datetime64_add_ubsan.sql
@@ -0,0 +1,2 @@
+-- The result is unspecified but UBSan should not argue.
+SELECT ignore(addHours(now64(3), inf)) FROM numbers(2);