diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d00330ae9..1244fc437 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -38,6 +38,8 @@ repos:
     rev: 1.7.9
     hooks:
       - id: bandit
+        additional_dependencies:
+          - bandit[toml]
         args:
           - --configfile=pyproject.toml
 
diff --git a/holidays/countries/united_states.py b/holidays/countries/united_states.py
index 03083f97c..8a83bedca 100644
--- a/holidays/countries/united_states.py
+++ b/holidays/countries/united_states.py
@@ -40,6 +40,9 @@ class UnitedStates(ObservedHolidayBase, ChristianHolidays, InternationalHolidays
     - https://en.wikipedia.org/wiki/Indigenous_Peoples%27_Day_(United_States)
     - https://www.sos.ri.gov/divisions/civics-and-education/reference-desk/ri-state-holidays
     - https://web.archive.org/web/20080831103521/http://www.dpa.ca.gov/personnel-policies/holidays.htm
+
+    Frances Xavier Cabrini Day:
+        - https://leg.colorado.gov/sites/default/files/2020a_1031_signed.pdf
     """
 
     country = "US"
@@ -325,6 +328,10 @@ def _populate_subdiv_co_public_holidays(self):
         if self._year >= 2001:
             self._add_holiday_mar_31("Cesar Chavez Day")
 
+        # Frances Xavier Cabrini Day
+        if self._year >= 2020:
+            self._add_holiday_1st_mon_of_oct("Frances Xavier Cabrini Day")
+
     def _populate_subdiv_ct_public_holidays(self):
         # Lincoln's Birthday
         if self._year >= 1971:
diff --git a/tests/countries/test_united_states.py b/tests/countries/test_united_states.py
index 0f4b96355..2d68e9597 100644
--- a/tests/countries/test_united_states.py
+++ b/tests/countries/test_united_states.py
@@ -1887,3 +1887,20 @@ def test_new_years_eve(self):
             self.assertNoNonObservedHolidayName(
                 f"{name} (observed)", UnitedStates(subdiv=subdiv, observed=False), obs_dt
             )
+
+    def test_frances_xavier_cabrini_day(self):
+        co_holidays = self.state_hols["CO"]
+        name = "Frances Xavier Cabrini Day"
+
+        self.assertNoHolidayName(name, co_holidays, range(2000, 2019))
+        self.assertHolidayName(name, co_holidays, range(2020, 2024))
+        self.assertHoliday(
+            co_holidays,
+            (
+                "2020-10-05",
+                "2021-10-04",
+                "2022-10-03",
+                "2023-10-02",
+                "2024-10-07",
+            ),
+        )