diff --git a/src/main/java/com/_8attery/seesaw/service/battery/BatteryService.java b/src/main/java/com/_8attery/seesaw/service/battery/BatteryService.java
index db4618f..4642c0a 100644
--- a/src/main/java/com/_8attery/seesaw/service/battery/BatteryService.java
+++ b/src/main/java/com/_8attery/seesaw/service/battery/BatteryService.java
@@ -123,7 +123,7 @@ public List<BatteryVariationResponseDto> getUserBatteryData(Long userId) throws
         try {
             Long batteryId = batteryRepository.findUserBatteryId(userId);
 
-            LocalDateTime endDate = LocalDateTime.now();  // Current date and time
+            LocalDateTime endDate = LocalDate.now().atStartOfDay();  // Current date and time
             LocalDateTime startDate = endDate.minusDays(30);  // 30 days ago
 
             List<BatteryDataVariationDto> variationData = batteryRepository.findUserBatteryVariation(batteryId, startDate, endDate);