diff --git a/CockpitSpace/RestartSimulation.js b/CockpitSpace/RestartSimulation.js
index 66fcdcdeb..4d5787271 100644
--- a/CockpitSpace/RestartSimulation.js
+++ b/CockpitSpace/RestartSimulation.js
@@ -103,7 +103,7 @@ function newRestartSimulation () {
     }
 
     let simulationParams = {
-      beginDatetime: dateAtScreenCorner.valueOf() / 1000 | 0,
+      beginDatetime: dateAtScreenCorner.valueOf(),
       resumeExecution: false,
       timePeriodDailyArray: timePeriodDailyArray,
       timePeriodMarketArray: timePeriodMarketArray,