diff --git a/js/component/card/air_quality_detail.js b/js/component/card/air_quality_detail.js
index 36acbea..5ff92c0 100644
--- a/js/component/card/air_quality_detail.js
+++ b/js/component/card/air_quality_detail.js
@@ -112,7 +112,7 @@ beestat.component.card.air_quality_detail.prototype.decorate_contents_ = functio
   // Don't go before there's data.
   required_begin = moment.max(
     required_begin,
-    moment.utc(thermostat.data_begin)
+    moment(thermostat.data_begin)
   );
 
   // Don't go after now.
diff --git a/js/component/card/air_quality_summary.js b/js/component/card/air_quality_summary.js
index e067158..ff38bc3 100644
--- a/js/component/card/air_quality_summary.js
+++ b/js/component/card/air_quality_summary.js
@@ -82,7 +82,7 @@ beestat.component.card.air_quality_summary.prototype.decorate_contents_ = functi
   // Don't go before there's data.
   required_begin = moment.max(
     required_begin,
-    moment.utc(thermostat.data_begin)
+    moment(thermostat.data_begin)
   );
 
   // Don't go after now.
diff --git a/js/component/card/runtime_sensor_detail.js b/js/component/card/runtime_sensor_detail.js
index 311a014..2ba7699 100644
--- a/js/component/card/runtime_sensor_detail.js
+++ b/js/component/card/runtime_sensor_detail.js
@@ -114,7 +114,7 @@ beestat.component.card.runtime_sensor_detail.prototype.decorate_contents_ = func
   // Don't go before there's data.
   required_begin = moment.max(
     required_begin,
-    moment.utc(thermostat.data_begin)
+    moment(thermostat.data_begin)
   );
 
   // Don't go after now.
diff --git a/js/component/card/runtime_thermostat_detail.js b/js/component/card/runtime_thermostat_detail.js
index 3abda4e..737c4d5 100644
--- a/js/component/card/runtime_thermostat_detail.js
+++ b/js/component/card/runtime_thermostat_detail.js
@@ -133,7 +133,7 @@ beestat.component.card.runtime_thermostat_detail.prototype.decorate_contents_ =
   // Don't go before there's data.
   required_begin = moment.max(
     required_begin,
-    moment.utc(thermostat.data_begin)
+    moment(thermostat.data_begin)
   );
 
   // Don't go after now.