diff --git a/intl/locale/AppDateTimeFormat.cpp b/intl/locale/AppDateTimeFormat.cpp
index d967d312a443ed..cafac1a41f00f9 100644
--- a/intl/locale/AppDateTimeFormat.cpp
+++ b/intl/locale/AppDateTimeFormat.cpp
@@ -73,7 +73,6 @@ nsresult AppDateTimeFormat::Format(const DateTimeFormat::ComponentsBag& aBag,
 
   aStringOut.Truncate();
 
-  nsAutoCString str;
   nsAutoString timeZoneID;
   BuildTimeZoneString(aExplodedTime->tm_params, timeZoneID);
 
@@ -82,7 +81,8 @@ nsresult AppDateTimeFormat::Format(const DateTimeFormat::ComponentsBag& aBag,
   auto dateTimePatternGenerator = genResult.unwrap();
 
   auto result = DateTimeFormat::TryCreateFromComponents(
-      *sLocale, aBag, dateTimePatternGenerator.get(), Some(timeZoneID));
+      *sLocale, aBag, dateTimePatternGenerator.get(),
+      Some(Span<const char16_t>(timeZoneID.Data(), timeZoneID.Length())));
   NS_ENSURE_TRUE(result.isOk(), NS_ERROR_FAILURE);
   auto dateTimeFormat = result.unwrap();
 
diff --git a/intl/locale/tests/gtest/TestAppDateTimeFormat.cpp b/intl/locale/tests/gtest/TestAppDateTimeFormat.cpp
index a83b37342873f9..52eaf48fb10e30 100644
--- a/intl/locale/tests/gtest/TestAppDateTimeFormat.cpp
+++ b/intl/locale/tests/gtest/TestAppDateTimeFormat.cpp
@@ -99,6 +99,16 @@ TEST(AppDateTimeFormat, FormatPRExplodedTime)
   ASSERT_TRUE(formattedTime.Find(u"2:47:00 PM") != kNotFound ||
               formattedTime.Find(u"2:47:00\u202FPM") != kNotFound ||
               formattedTime.Find(u"14:47:00") != kNotFound);
+
+  ComponentsBag components{};
+  components.weekday = mozilla::Some(DateTimeFormat::Text::Short);
+  components.timeZoneName = mozilla::Some(DateTimeFormat::TimeZoneName::Short);
+  // From above: Wed, 31 Dec 1969 14:47:00 -09:13
+  rv = AppDateTimeFormat::Format(components, &prExplodedTime, formattedTime);
+  ASSERT_NS_SUCCEEDED(rv);
+  ASSERT_TRUE(formattedTime.Find(u"Wed") != kNotFound);
+  ASSERT_TRUE(formattedTime.Find(u"-09:13") != kNotFound ||
+              formattedTime.Find(u"-9:13") != kNotFound);
 }
 
 TEST(AppDateTimeFormat, DateFormatSelectors)