diff --git a/apps/payment/models.py b/apps/payment/models.py
index 4f498d9b..5644eb7e 100644
--- a/apps/payment/models.py
+++ b/apps/payment/models.py
@@ -124,22 +124,6 @@ class Payment(PolymorphicModel):
         verbose_name_plural = 'Платежи'
         ordering = ('created_at',)
 
-    @classmethod
-    def add_months(cls, sourcedate, months=1, is_camp=False):
-        # Лагерь всегда до коонца месяца покупается
-        if is_camp:
-            return arrow.get(sourcedate.replace(day=1), settings.TIME_ZONE).shift(months=months).date() - timedelta(1)
-        # FIXME после мая 2019 убрать?
-        # Если хотят купить школу в мае, то оплатить ее можно только до 31 мая, потом школа закроется
-        if sourcedate.month == 5:
-            return sourcedate.replace(day=31)
-        result = arrow.get(sourcedate, settings.TIME_ZONE).shift(months=months)
-        if months == 1:
-            if (sourcedate.month == 2 and sourcedate.day >= 28) or (sourcedate.day == 31 and result.day <= 30) \
-                or (sourcedate.month == 1 and sourcedate.day >= 29 and result.day == 28):
-                result = result.replace(day=1, month=result.month + 1)
-        return result.datetime
-
     @classmethod
     def get_date_range(cls, date_start=None, days=0, months=0, is_camp=False):
         school_start = date(now().year, 9, 1)
@@ -152,6 +136,8 @@ class Payment(PolymorphicModel):
         if is_camp:
             if date_start < camp_start:
                 date_start = camp_start
+            if date_start.month == 6 and date_start.day > 15:
+                date_start = date_start.replace(month=7, day=1)
         elif school_end < date_start < school_start:
             date_start = school_start
         date_end = arrow.get(date_start + timedelta(days=days), settings.TIME_ZONE).shift(months=months).date() - timedelta(1)