diff --git a/apps/enm/services.py b/apps/enm/services.py
index c1a344ab..b8931054 100644
--- a/apps/enm/services.py
+++ b/apps/enm/services.py
@@ -3,6 +3,7 @@ import re
 import traceback
 from apps.mtm.services import get_mgroup_goals
 from django.db.models import Q
+import datetime
 
 
 def translate_eval_formula(exp_str: str, year: int, month: int, day: int, hour: int):
@@ -19,6 +20,17 @@ def translate_eval_formula(exp_str: str, year: int, month: int, day: int, hour:
     return rval
 
 
+def get_day_s(year: int, month: int, day: int, hour: int, hour_split: int = 21):
+    """
+    根据给定的小时数, 计算出班天
+    """
+    if hour <= hour_split:
+        return year, month, day
+    else:
+        now = datetime.datetime(year, month, day, hour)
+        now2 = now + datetime.timedelta(days=1)
+        return now2.year, now2.month, now2.day
+
 # cal_rule = {
 #     "电石渣": {
 #         "total_production": 0.4,