diff --git a/velox/functions/prestosql/FromUnixTime.cpp b/velox/functions/prestosql/FromUnixTime.cpp
index 946c1866be27..0d7f0d2dad6e 100644
--- a/velox/functions/prestosql/FromUnixTime.cpp
+++ b/velox/functions/prestosql/FromUnixTime.cpp
@@ -21,6 +21,9 @@ namespace facebook::velox::functions {
 namespace {
 
 inline int64_t toMillis(double unixtime) {
+  if (UNLIKELY(std::isnan(unixtime))) {
+    return 0;
+  }
   return std::floor(unixtime * 1'000);
 }
 
diff --git a/velox/functions/prestosql/tests/DateTimeFunctionsTest.cpp b/velox/functions/prestosql/tests/DateTimeFunctionsTest.cpp
index 4baaa36fbe0f..74b023341700 100644
--- a/velox/functions/prestosql/tests/DateTimeFunctionsTest.cpp
+++ b/velox/functions/prestosql/tests/DateTimeFunctionsTest.cpp
@@ -275,6 +275,8 @@ TEST_F(DateTimeFunctionsTest, fromUnixtimeRountTrip) {
 }
 
 TEST_F(DateTimeFunctionsTest, fromUnixtimeWithTimeZone) {
+  static const double kNan = std::numeric_limits<double>::quiet_NaN();
+
   vector_size_t size = 37;
 
   auto unixtimeAt = [](vector_size_t row) -> double {
@@ -295,6 +297,17 @@ TEST_F(DateTimeFunctionsTest, fromUnixtimeWithTimeZone) {
         makeConstant((int16_t)900, size),
     });
     assertEqualVectors(expected, result);
+
+    // NaN timestamp.
+    result = evaluate<RowVector>(
+        "from_unixtime(c0, '+01:00')",
+        makeRowVector({makeFlatVector<double>({kNan, kNan})}));
+    ASSERT_TRUE(isTimestampWithTimeZoneType(result->type()));
+    expected = makeRowVector({
+        makeFlatVector<int64_t>({0, 0}),
+        makeFlatVector<int16_t>({900, 900}),
+    });
+    assertEqualVectors(expected, result);
   }
 
   // Variable timezone parameter.
@@ -317,6 +330,20 @@ TEST_F(DateTimeFunctionsTest, fromUnixtimeWithTimeZone) {
             size, [&](auto row) { return timezoneIds[row % 5]; }),
     });
     assertEqualVectors(expected, result);
+
+    // NaN timestamp.
+    result = evaluate<RowVector>(
+        "from_unixtime(c0, c1)",
+        makeRowVector({
+            makeFlatVector<double>({kNan, kNan}),
+            makeNullableFlatVector<StringView>({"+01:00", "+02:00"}),
+        }));
+    ASSERT_TRUE(isTimestampWithTimeZoneType(result->type()));
+    expected = makeRowVector({
+        makeFlatVector<int64_t>({0, 0}),
+        makeFlatVector<int16_t>({900, 960}),
+    });
+    assertEqualVectors(expected, result);
   }
 }