diff --git a/airflow/www/static/js/cluster-activity/nav/FilterBar.tsx b/airflow/www/static/js/cluster-activity/nav/FilterBar.tsx
index 6cae7854f1844..b4f840cb5fc64 100644
--- a/airflow/www/static/js/cluster-activity/nav/FilterBar.tsx
+++ b/airflow/www/static/js/cluster-activity/nav/FilterBar.tsx
@@ -81,7 +81,7 @@ const FilterBar = () => {
         </Box>
         <Flex alignItems="center">
           <Text whiteSpace="nowrap">
-            over the last{" "}
+            for a period of{" "}
             {formatDuration(getDuration(formattedStartDate, formattedEndDate))}
           </Text>
         </Flex>
diff --git a/airflow/www/static/js/datetime_utils.js b/airflow/www/static/js/datetime_utils.js
index c23f8d665e839..5eb1f1defb8f8 100644
--- a/airflow/www/static/js/datetime_utils.js
+++ b/airflow/www/static/js/datetime_utils.js
@@ -120,7 +120,8 @@ export const getDuration = (startDate, endDate) =>
 
 export const formatDuration = (dur) => {
   const duration = moment.duration(dur);
-  const days = duration.days();
+  const totalDays = duration.asDays();
+  const days = Math.floor(totalDays);
   // .as('milliseconds') is necessary for .format() to work correctly
   return `${days > 0 ? `${days}d` : ""}${moment
     .utc(duration.as("milliseconds"))