diff --git a/homeassistant/components/holiday/manifest.json b/homeassistant/components/holiday/manifest.json
index edf3ebe7f04..6952d48ef32 100644
--- a/homeassistant/components/holiday/manifest.json
+++ b/homeassistant/components/holiday/manifest.json
@@ -5,5 +5,5 @@
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/holiday",
   "iot_class": "local_polling",
-  "requirements": ["holidays==0.65", "babel==2.15.0"]
+  "requirements": ["holidays==0.66", "babel==2.15.0"]
 }
diff --git a/homeassistant/components/workday/manifest.json b/homeassistant/components/workday/manifest.json
index 4b9d072f747..cbb11a06aec 100644
--- a/homeassistant/components/workday/manifest.json
+++ b/homeassistant/components/workday/manifest.json
@@ -7,5 +7,5 @@
   "iot_class": "local_polling",
   "loggers": ["holidays"],
   "quality_scale": "internal",
-  "requirements": ["holidays==0.65"]
+  "requirements": ["holidays==0.66"]
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index 284afccb5f1..83b6786e1c8 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1143,7 +1143,7 @@ hole==0.8.0
 
 # homeassistant.components.holiday
 # homeassistant.components.workday
-holidays==0.65
+holidays==0.66
 
 # homeassistant.components.frontend
 home-assistant-frontend==20250205.0
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 07ddbd78fb9..25eb1978a2a 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -972,7 +972,7 @@ hole==0.8.0
 
 # homeassistant.components.holiday
 # homeassistant.components.workday
-holidays==0.65
+holidays==0.66
 
 # homeassistant.components.frontend
 home-assistant-frontend==20250205.0