dates fix

server/backend/handlers/ozon_handler.py

@@ -4,9 +4,10 @@ from server.backend.api.nomenclature import processing
 import datetime
 import re
 def last_day_of_month(format: str):
-    next_month = datetime.datetime.now().replace(day=28) + datetime.timedelta(days=4)
-    last_day = next_month - datetime.timedelta(days=next_month.day)
-    return last_day.strftime(format)
+    today = datetime.datetime.now()
+    first_day_current_month = today.replace(day=1)
+    last_day_prev_month = first_day_current_month - datetime.timedelta(days=1)
+    return last_day_prev_month.strftime(format)
 def process_sheet(df,real_arti: int,real_quantity: int,real_sum_1: int,real_sum_2: int):
     # выбираем нужные колонки по индексам
     df = df.iloc[:, [real_arti, real_quantity, real_sum_1, real_sum_2]].copy()