diff --git a/BackendWorkerService/Services/Implement/ProcEletricMeterService.cs b/BackendWorkerService/Services/Implement/ProcEletricMeterService.cs
index 57056c1..570eef7 100644
--- a/BackendWorkerService/Services/Implement/ProcEletricMeterService.cs
+++ b/BackendWorkerService/Services/Implement/ProcEletricMeterService.cs
@@ -1442,7 +1442,7 @@ namespace BackendWorkerService.Services.Implement
         }
         public IEnumerable<DateTime> EachMonth(string from, string thru)
         {
-            var strtday = DateTime.Parse(from);
+            var strtday = DateTime.Parse(from).AddMonths(-1);
             var endday = DateTime.Parse(thru);
 
             for (var _month = strtday.Date; _month <= endday; _month = _month.AddMonths(1))