diff --git a/holidays/countries/bosnia_and_herzegovina.py b/holidays/countries/bosnia_and_herzegovina.py
index a646945ee..1ce97690f 100644
--- a/holidays/countries/bosnia_and_herzegovina.py
+++ b/holidays/countries/bosnia_and_herzegovina.py
@@ -15,9 +15,22 @@
 from gettext import gettext as tr
 
 from holidays.calendars import _CustomIslamicCalendar
-from holidays.calendars.gregorian import GREGORIAN_CALENDAR
+from holidays.calendars.gregorian import (
+    GREGORIAN_CALENDAR,
+    JAN,
+    FEB,
+    MAR,
+    APR,
+    MAY,
+    JUN,
+    JUL,
+    AUG,
+    SEP,
+    OCT,
+    NOV,
+    DEC,
+)
 from holidays.calendars.julian import JULIAN_CALENDAR
-from holidays.constants import JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC
 from holidays.groups import ChristianHolidays, IslamicHolidays, InternationalHolidays
 from holidays.holiday_base import HolidayBase
 
diff --git a/holidays/countries/latvia.py b/holidays/countries/latvia.py
index 80622ab71..c59b757c2 100644
--- a/holidays/countries/latvia.py
+++ b/holidays/countries/latvia.py
@@ -13,7 +13,7 @@
 from datetime import timedelta as td
 from gettext import gettext as tr
 
-from holidays.constants import MAY, JUL, SEP
+from holidays.calendars.gregorian import MAY, JUL, SEP
 from holidays.groups import ChristianHolidays, InternationalHolidays
 from holidays.holiday_base import HolidayBase