diff --git a/packages/web/src/Audit/FleetStats.php b/packages/web/src/Audit/FleetStats.php
index 8fb0ca2..f0f7cb6 100644
--- a/packages/web/src/Audit/FleetStats.php
+++ b/packages/web/src/Audit/FleetStats.php
@@ -256,10 +256,14 @@ class FleetStats extends WindowedStats
         \DateTimeInterface $start,
         \DateTimeInterface $end
     ) {
+        // hosts.hostCreateDate is a TIMESTAMP.
         return self::dailySeries(
             self::readWindow(self::_addedPerDaySql(), $start, $end),
             $start,
-            $end
+            $end,
+            'd',
+            'c',
+            false
         );
     }
 
diff --git a/packages/web/src/Audit/ImagingStats.php b/packages/web/src/Audit/ImagingStats.php
index 5a1eae5..388436b 100644
--- a/packages/web/src/Audit/ImagingStats.php
+++ b/packages/web/src/Audit/ImagingStats.php
@@ -236,7 +236,8 @@ class ImagingStats extends WindowedStats
     ) {
         $rows = self::_read(self::_runsPerDaySql(), $start, $end);
 
-        return self::dailySeries($rows, $start, $end);
+        // taskLog.createTime is a TIMESTAMP.
+        return self::dailySeries($rows, $start, $end, 'd', 'c', false);
     }
 
     /**
diff --git a/packages/web/src/Audit/InventoryStats.php b/packages/web/src/Audit/InventoryStats.php
index cb8c804..70b0c58 100644
--- a/packages/web/src/Audit/InventoryStats.php
+++ b/packages/web/src/Audit/InventoryStats.php
@@ -176,10 +176,14 @@ class InventoryStats extends WindowedStats
         \DateTimeInterface $start,
         \DateTimeInterface $end
     ) {
+        // inventory.iCreateDate is a TIMESTAMP.
         return self::dailySeries(
             self::readWindow(self::_recordedPerDaySql(), $start, $end),
             $start,
-            $end
+            $end,
+            'd',
+            'c',
+            false
         );
     }
 
diff --git a/packages/web/src/Audit/StorageStats.php b/packages/web/src/Audit/StorageStats.php
index f6663df..587e192 100644
--- a/packages/web/src/Audit/StorageStats.php
+++ b/packages/web/src/Audit/StorageStats.php
@@ -269,10 +269,14 @@ class StorageStats extends WindowedStats
         \DateTimeInterface $start,
         \DateTimeInterface $end
     ) {
+        // images.imageDateTime is a TIMESTAMP.
         return self::dailySeries(
             self::readWindow(self::_addedPerDaySql(), $start, $end),
             $start,
-            $end
+            $end,
+            'd',
+            'c',
+            false
         );
     }
 
diff --git a/packages/web/src/Audit/WindowedStats.php b/packages/web/src/Audit/WindowedStats.php
index 041ea56..eaaa8d8 100644
--- a/packages/web/src/Audit/WindowedStats.php
+++ b/packages/web/src/Audit/WindowedStats.php
@@ -136,6 +136,13 @@ abstract class WindowedStats extends FOGBase
      * @param \DateTimeInterface $end   the upper bound as given
      * @param string             $dateK the rows' date column
      * @param string             $countK the rows' count column
+     * @param bool               $isDatetime whether the charted column is
+     *                                  DATETIME rather than TIMESTAMP. A
+     *                                  TIMESTAMP comes back from the UTC
+     *                                  session as UTC for every row and is
+     *                                  never pre-boundary; reading one as
+     *                                  DATETIME puts runs near the boundary
+     *                                  on the wrong day, or off the series.
      *
      * @return array Ordered list of ['date' => 'Y-m-d', 'count' => int].
      */
@@ -144,7 +151,8 @@ abstract class WindowedStats extends FOGBase
         \DateTimeInterface $start,
         \DateTimeInterface $end,
         $dateK = 'd',
-        $countK = 'c'
+        $countK = 'c',
+        $isDatetime = true
     ) {
         // Clamped here as well as inside readWindow(), because this walks
         // the window itself -- an unclamped one would emit a point per day
@@ -163,7 +171,10 @@ abstract class WindowedStats extends FOGBase
             if (!isset($row[$dateK])) {
                 continue;
             }
-            $day = self::toDisplayStored((string)$row[$dateK])->format('Y-m-d');
+            $day = self::toDisplayStored(
+                (string)$row[$dateK],
+                $isDatetime
+            )->format('Y-m-d');
             $counts[$day] = (isset($counts[$day]) ? $counts[$day] : 0)
                 + (int)$row[$countK];
         }