diff --git a/scwx-qt/source/scwx/qt/map/overlay_layer.cpp b/scwx-qt/source/scwx/qt/map/overlay_layer.cpp
index 1f1844fd..0f7f27b2 100644
--- a/scwx-qt/source/scwx/qt/map/overlay_layer.cpp
+++ b/scwx-qt/source/scwx/qt/map/overlay_layer.cpp
@@ -52,6 +52,20 @@ class OverlayLayerImpl
    {
       auto& generalSettings = settings::GeneralSettings::Instance();
 
+      clockFormatCallbackUuid_ =
+         generalSettings.clock_format().RegisterValueChangedCallback(
+            [this](const std::string&)
+            {
+               sweepTimeNeedsUpdate_ = true;
+               Q_EMIT self_->NeedsRendering();
+            });
+      defaultTimeZoneCallbackUuid_ =
+         generalSettings.default_time_zone().RegisterValueChangedCallback(
+            [this](const std::string&)
+            {
+               sweepTimeNeedsUpdate_ = true;
+               Q_EMIT self_->NeedsRendering();
+            });
       showMapAttributionCallbackUuid_ =
          generalSettings.show_map_attribution().RegisterValueChangedCallback(
             [this](const bool&) { Q_EMIT self_->NeedsRendering(); });
@@ -64,6 +78,10 @@ class OverlayLayerImpl
    {
       auto& generalSettings = settings::GeneralSettings::Instance();
 
+      generalSettings.clock_format().UnregisterValueChangedCallback(
+         clockFormatCallbackUuid_);
+      generalSettings.default_time_zone().UnregisterValueChangedCallback(
+         defaultTimeZoneCallbackUuid_);
       generalSettings.show_map_attribution().UnregisterValueChangedCallback(
          showMapAttributionCallbackUuid_);
       generalSettings.show_map_logo().UnregisterValueChangedCallback(
@@ -72,6 +90,8 @@ class OverlayLayerImpl
 
    OverlayLayer* self_;
 
+   boost::uuids::uuid clockFormatCallbackUuid_;
+   boost::uuids::uuid defaultTimeZoneCallbackUuid_;
    boost::uuids::uuid showMapAttributionCallbackUuid_;
    boost::uuids::uuid showMapLogoCallbackUuid_;
 
@@ -263,8 +283,11 @@ void OverlayLayer::Render(const QMapLibre::CustomLayerRenderParameters& params)
 
    p->sweepTimePicked_ = false;
 
-   if (p->sweepTimeNeedsUpdate_ && radarProductView != nullptr)
+   if (radarProductView != nullptr)
    {
+      scwx::util::ClockFormat clockFormat = scwx::util::GetClockFormat(
+         settings::GeneralSettings::Instance().clock_format().GetValue());
+
       const scwx::util::time_zone* currentZone;
 
 #if defined(_MSC_VER)
@@ -274,7 +297,7 @@ void OverlayLayer::Render(const QMapLibre::CustomLayerRenderParameters& params)
 #endif
 
       p->sweepTimeString_ = scwx::util::TimeString(
-         radarProductView->sweep_time(), currentZone, false);
+         radarProductView->sweep_time(), clockFormat, currentZone, false);
       p->sweepTimeNeedsUpdate_ = false;
    }
 
diff --git a/scwx-qt/source/scwx/qt/view/level3_product_view.cpp b/scwx-qt/source/scwx/qt/view/level3_product_view.cpp
index 12f9816c..fb6110dc 100644
--- a/scwx-qt/source/scwx/qt/view/level3_product_view.cpp
+++ b/scwx-qt/source/scwx/qt/view/level3_product_view.cpp
@@ -1,4 +1,5 @@
 #include <scwx/qt/view/level3_product_view.hpp>
+#include <scwx/qt/settings/general_settings.hpp>
 #include <scwx/common/characters.hpp>
 #include <scwx/common/constants.hpp>
 #include <scwx/util/logger.hpp>
@@ -176,6 +177,9 @@ Level3ProductView::GetDescriptionFields() const
 
    if (p->graphicMessage_ != nullptr)
    {
+      util::ClockFormat clockFormat = util::GetClockFormat(
+         settings::GeneralSettings::Instance().clock_format().GetValue());
+
       const scwx::util::time_zone* currentZone;
 
 #if defined(_MSC_VER)
@@ -197,10 +201,12 @@ Level3ProductView::GetDescriptionFields() const
 
          description.emplace_back(
             "Volume Time",
-            scwx::util::TimeString(volumeTime, currentZone, false));
+            scwx::util::TimeString(
+               volumeTime, clockFormat, currentZone, false));
          description.emplace_back(
             "Product Time",
-            scwx::util::TimeString(productTime, currentZone, false));
+            scwx::util::TimeString(
+               productTime, clockFormat, currentZone, false));
 
          description.emplace_back(
             "Sequence Number",
diff --git a/wxdata/include/scwx/util/time.hpp b/wxdata/include/scwx/util/time.hpp
index b5ef06df..62242589 100644
--- a/wxdata/include/scwx/util/time.hpp
+++ b/wxdata/include/scwx/util/time.hpp
@@ -38,8 +38,9 @@ std::chrono::system_clock::time_point TimePoint(uint32_t modifiedJulianDate,
                                                 uint32_t milliseconds);
 
 std::string TimeString(std::chrono::system_clock::time_point time,
-                       const time_zone*                      timeZone = nullptr,
-                       bool                                  epochValid = true);
+                       ClockFormat      clockFormat = ClockFormat::_24Hour,
+                       const time_zone* timeZone    = nullptr,
+                       bool             epochValid  = true);
 
 template<typename T>
 std::optional<std::chrono::sys_time<T>>
diff --git a/wxdata/source/scwx/util/time.cpp b/wxdata/source/scwx/util/time.cpp
index a46c28a3..cb961649 100644
--- a/wxdata/source/scwx/util/time.cpp
+++ b/wxdata/source/scwx/util/time.cpp
@@ -49,6 +49,7 @@ std::chrono::system_clock::time_point TimePoint(uint32_t modifiedJulianDate,
 }
 
 std::string TimeString(std::chrono::system_clock::time_point time,
+                       ClockFormat                           clockFormat,
                        const time_zone*                      timeZone,
                        bool                                  epochValid)
 {
@@ -65,12 +66,27 @@ std::string TimeString(std::chrono::system_clock::time_point time,
    {
       if (timeZone != nullptr)
       {
-         zoned_time zt = {current_zone(), timeInSeconds};
-         os << zt;
+         zoned_time zt = {timeZone, timeInSeconds};
+
+         if (clockFormat == ClockFormat::_24Hour)
+         {
+            os << format("{:%Y-%m-%d %H:%M:%S %Z}", zt);
+         }
+         else
+         {
+            os << format("{:%Y-%m-%d %I:%M:%S %p %Z}", zt);
+         }
       }
       else
       {
-         os << timeInSeconds;
+         if (clockFormat == ClockFormat::_24Hour)
+         {
+            os << format("{:%Y-%m-%d %H:%M:%S %Z}", timeInSeconds);
+         }
+         else
+         {
+            os << format("{:%Y-%m-%d %I:%M:%S %p %Z}", timeInSeconds);
+         }
       }
    }