diff --git a/Utilities.js b/Utilities.js
index 118ec8f65..4ff33d663 100644
--- a/Utilities.js
+++ b/Utilities.js
@@ -8,7 +8,7 @@ function getUICurrentValues () {
   let timePeriod = timePeriodArray[currentTimePeriod.timePeriodIndex][1]
 
   let uiCurrentValues = {
-    beginDatetime: dateAtScreenCorner,
+    initialDatetime: dateAtScreenCorner,
     timePeriod: timePeriod,
     timestamp: (new Date()).valueOf()
   }