diff --git a/YD_YiLu/Services/Impl/DeviceSyncService.cs b/YD_YiLu/Services/Impl/DeviceSyncService.cs
index f333740..2d1a3c1 100644
--- a/YD_YiLu/Services/Impl/DeviceSyncService.cs
+++ b/YD_YiLu/Services/Impl/DeviceSyncService.cs
@@ -1123,7 +1123,7 @@ namespace YD_YiLu.Api.Services.Impl
                     .Select(i => today.AddDays(i - 6))
                     .Select(day => new YtpGradeListItem
                     {
-                        Time = day.ToString("yyyy-MM-dd"),
+                        Time = day.ToString("MM-dd"),
                         Duration = "0",
                         Count = "0"
                     })
@@ -1147,7 +1147,7 @@ namespace YD_YiLu.Api.Services.Impl
                     var daySeconds = dayTrains.Sum(x => x.Duration);
                     return new YtpGradeListItem
                     {
-                        Time = day.ToString("yyyy-MM-dd"),
+                        Time = day.ToString("MM-dd"),
                         Duration = SecondsToHours(daySeconds),
                         Count = dayTrains.Count.ToString()
                     };