diff --git a/yuthon_hr_attendance/models/yuthon_duty_plan.py b/yuthon_hr_attendance/models/yuthon_duty_plan.py
index 88fe5308d..e9c61f15e 100644
--- a/yuthon_hr_attendance/models/yuthon_duty_plan.py
+++ b/yuthon_hr_attendance/models/yuthon_duty_plan.py
@@ -66,10 +66,17 @@ class YuthonDutyPlan(models.Model):
                 first_day_of_month = datetime(next_year, 1, 1)
                 last_day_of_month = datetime(next_year,2, 1)
             else:
-                first_day_of_month = datetime(next_year, latest_month+1, 1)
-                next_next_month = (latest_month % 12) + 1
-                next_year = year + (1 if next_month == 1 else 0)
-                last_day_of_month = datetime(next_year, next_next_month+1, 1)
+                next_year = latest_year
+                next_month = latest_month + 1
+                first_day_of_month = datetime(next_year, next_month, 1)
+                # 计算下下一个月的第一天
+                if next_month == 12:
+                    next_next_year = next_year + 1
+                    next_next_month = 1
+                else:
+                    next_next_year = next_year
+                    next_next_month = next_month + 1
+                last_day_of_month = datetime(next_next_year, next_next_month, 1)
         role_a = self.env['planning.role'].search([('name', '=', '联安粮库')], limit=1)
         role_template_a = self.env['planning.slot.template'].search([('planning_name', '=', '白班'), ('role_id', '=', role_a.id)])
         role_template_b = self.env['planning.slot.template'].search([('planning_name', '=', '白值'), ('role_id', '=', role_a.id)])