diff --git a/apps/dine-pleiepenger/package.json b/apps/dine-pleiepenger/package.json
index 96bc2baae..768d9c37d 100644
--- a/apps/dine-pleiepenger/package.json
+++ b/apps/dine-pleiepenger/package.json
@@ -75,7 +75,7 @@
         "postcss": "8.4.49",
         "postcss-import": "16.1.0",
         "react": "19.0.0",
-        "react-day-picker": "8.10.1",
+        "react-day-picker": "9.4.3",
         "react-dom": "19.0.0",
         "react-intl": "7.0.4",
         "storybook": "8.4.7",
diff --git a/apps/endringsmelding-pleiepenger/package.json b/apps/endringsmelding-pleiepenger/package.json
index db5682635..c95be37e4 100644
--- a/apps/endringsmelding-pleiepenger/package.json
+++ b/apps/endringsmelding-pleiepenger/package.json
@@ -34,7 +34,7 @@
         "lodash": "4.17.21",
         "object-hash": "3.0.0",
         "react": "19.0.0",
-        "react-day-picker": "8.10.1",
+        "react-day-picker": "9.4.3",
         "react-dom": "19.0.0",
         "react-intl": "7.0.4",
         "react-router-dom": "7.0.2"
diff --git a/apps/omsorgsdager-kalkulator/package.json b/apps/omsorgsdager-kalkulator/package.json
index 71361522d..0e501628e 100644
--- a/apps/omsorgsdager-kalkulator/package.json
+++ b/apps/omsorgsdager-kalkulator/package.json
@@ -31,7 +31,7 @@
         "next": "15.1.0",
         "node-fetch": "3.3.2",
         "react": "19.0.0",
-        "react-day-picker": "8.10.1",
+        "react-day-picker": "9.4.3",
         "react-dom": "19.0.0",
         "react-intl": "7.0.4",
         "uuid": "11.0.3"
diff --git a/apps/pleiepenger-sykt-barn/package.json b/apps/pleiepenger-sykt-barn/package.json
index c9197741a..03ba90b0d 100644
--- a/apps/pleiepenger-sykt-barn/package.json
+++ b/apps/pleiepenger-sykt-barn/package.json
@@ -35,7 +35,7 @@
         "lodash.groupby": "4.6.0",
         "mockdate": "3.0.5",
         "react": "19.0.0",
-        "react-day-picker": "8.10.1",
+        "react-day-picker": "9.4.3",
         "react-router-dom": "7.0.2",
         "uuid": "11.0.3"
     },
diff --git a/apps/sif-ettersending/package.json b/apps/sif-ettersending/package.json
index 0f94c3460..3d5420870 100644
--- a/apps/sif-ettersending/package.json
+++ b/apps/sif-ettersending/package.json
@@ -35,7 +35,7 @@
         "jsdom": "25.0.1",
         "lodash": "4.17.21",
         "react": "19.0.0",
-        "react-day-picker": "8.10.1",
+        "react-day-picker": "9.4.3",
         "react-intl": "7.0.4",
         "react-router-dom": "7.0.2"
     },
diff --git a/packages/sif-common-api/package.json b/packages/sif-common-api/package.json
index b2d8ebb95..7919efe96 100644
--- a/packages/sif-common-api/package.json
+++ b/packages/sif-common-api/package.json
@@ -15,7 +15,7 @@
         "axios": "1.7.9",
         "classnames": "2.5.1",
         "dayjs": "1.11.13",
-        "react-day-picker": "8.10.1",
+        "react-day-picker": "9.4.3",
         "zod": "3.24.1"
     },
     "devDependencies": {
diff --git a/packages/sif-common-core-ds/package.json b/packages/sif-common-core-ds/package.json
index 695b782ff..6c964a336 100644
--- a/packages/sif-common-core-ds/package.json
+++ b/packages/sif-common-core-ds/package.json
@@ -55,7 +55,7 @@
         "postcss": "8.4.49",
         "prop-types": "15.8.1",
         "react": "19.0.0",
-        "react-day-picker": "8.10.1",
+        "react-day-picker": "9.4.3",
         "react-dom": "19.0.0",
         "react-intl": "7.0.4",
         "react-responsive": "10.0.0",
diff --git a/packages/sif-common-formik-ds/package.json b/packages/sif-common-formik-ds/package.json
index edc901c3b..33c8513ba 100644
--- a/packages/sif-common-formik-ds/package.json
+++ b/packages/sif-common-formik-ds/package.json
@@ -56,7 +56,7 @@
         "jest": "29.7.0",
         "prop-types": "15.8.1",
         "react": "19.0.0",
-        "react-day-picker": "8.10.1",
+        "react-day-picker": "9.4.3",
         "react-dom": "19.0.0",
         "react-intl": "7.0.4",
         "react-syntax-highlighter": "15.6.1",
diff --git a/packages/sif-common-forms-ds/package.json b/packages/sif-common-forms-ds/package.json
index 69c36ba24..bc461f94d 100644
--- a/packages/sif-common-forms-ds/package.json
+++ b/packages/sif-common-forms-ds/package.json
@@ -56,7 +56,7 @@
         "intl": "1.2.5",
         "jsdom": "25.0.1",
         "react": "19.0.0",
-        "react-day-picker": "8.10.1",
+        "react-day-picker": "9.4.3",
         "react-dom": "19.0.0",
         "react-intl": "7.0.4",
         "react-json-view": "1.21.3",
diff --git a/packages/sif-common-soknad-ds/package.json b/packages/sif-common-soknad-ds/package.json
index 591208f69..f2e151ad6 100644
--- a/packages/sif-common-soknad-ds/package.json
+++ b/packages/sif-common-soknad-ds/package.json
@@ -77,7 +77,7 @@
         "monocle-ts": "2.3.13",
         "newtype-ts": "0.3.5",
         "react": "19.0.0",
-        "react-day-picker": "8.10.1",
+        "react-day-picker": "9.4.3",
         "react-dom": "19.0.0",
         "react-intl": "7.0.4",
         "react-router-dom": "7.0.2",
diff --git a/packages/sif-common-ui/package.json b/packages/sif-common-ui/package.json
index 3e72d4ffc..c2a690c26 100644
--- a/packages/sif-common-ui/package.json
+++ b/packages/sif-common-ui/package.json
@@ -12,7 +12,7 @@
         "@navikt/sif-common-formik-ds": "*",
         "@navikt/sif-common-utils": "*",
         "classnames": "2.5.1",
-        "react-day-picker": "8.10.1"
+        "react-day-picker": "9.4.3"
     },
     "devDependencies": {
         "@sif/eslint-config": "*",
diff --git a/yarn.lock b/yarn.lock
index d73717ec7..e573fe963 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2055,6 +2055,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@date-fns/tz@npm:^1.2.0":
+  version: 1.2.0
+  resolution: "@date-fns/tz@npm:1.2.0"
+  checksum: 10/a9c2d32f98a5a5c655a7d3843046a5a36779b2ef0db803c608291976e6254e594a085777bf738379f50c7e9fc2ffebbf8bb836e9e9759a5ef2b703f91bb785de
+  languageName: node
+  linkType: hard
+
 "@devexperts/remote-data-ts@npm:2.1.1":
   version: 2.1.1
   resolution: "@devexperts/remote-data-ts@npm:2.1.1"
@@ -3807,7 +3814,7 @@ __metadata:
     postcss: "npm:8.4.49"
     postcss-import: "npm:16.1.0"
     react: "npm:19.0.0"
-    react-day-picker: "npm:8.10.1"
+    react-day-picker: "npm:9.4.3"
     react-dom: "npm:19.0.0"
     react-intl: "npm:7.0.4"
     react-loading-skeleton: "npm:3.5.0"
@@ -4007,7 +4014,7 @@ __metadata:
     postcss: "npm:8.4.49"
     postcss-import: "npm:16.1.0"
     react: "npm:19.0.0"
-    react-day-picker: "npm:8.10.1"
+    react-day-picker: "npm:9.4.3"
     react-dom: "npm:19.0.0"
     react-intl: "npm:7.0.4"
     react-responsive: "npm:10.0.0"
@@ -4158,7 +4165,7 @@ __metadata:
     playwright-core: "npm:1.49.1"
     postcss: "npm:8.4.49"
     react: "npm:19.0.0"
-    react-day-picker: "npm:8.10.1"
+    react-day-picker: "npm:9.4.3"
     react-dom: "npm:19.0.0"
     react-intl: "npm:7.0.4"
     tailwindcss: "npm:3.4.16"
@@ -4634,7 +4641,7 @@ __metadata:
     mustache-express: "npm:1.3.2"
     playwright-core: "npm:1.49.1"
     react: "npm:19.0.0"
-    react-day-picker: "npm:8.10.1"
+    react-day-picker: "npm:9.4.3"
     react-dom: "npm:19.0.0"
     react-intl: "npm:7.0.4"
     react-router-dom: "npm:7.0.2"
@@ -4725,7 +4732,7 @@ __metadata:
     less: "npm:4.2.1"
     postcss: "npm:8.4.49"
     react: "npm:19.0.0"
-    react-day-picker: "npm:8.10.1"
+    react-day-picker: "npm:9.4.3"
     react-dom: "npm:19.0.0"
     react-intl: "npm:7.0.4"
     storybook: "npm:8.4.7"
@@ -4785,7 +4792,7 @@ __metadata:
     pretty-bytes: "npm:6.1.1"
     prop-types: "npm:15.8.1"
     react: "npm:19.0.0"
-    react-day-picker: "npm:8.10.1"
+    react-day-picker: "npm:9.4.3"
     react-dom: "npm:19.0.0"
     react-intl: "npm:7.0.4"
     react-responsive: "npm:10.0.0"
@@ -4866,7 +4873,7 @@ __metadata:
     lodash: "npm:4.17.21"
     prop-types: "npm:15.8.1"
     react: "npm:19.0.0"
-    react-day-picker: "npm:8.10.1"
+    react-day-picker: "npm:9.4.3"
     react-dom: "npm:19.0.0"
     react-dropzone: "npm:14.3.5"
     react-fast-compare: "npm:3.2.2"
@@ -4932,7 +4939,7 @@ __metadata:
     intl: "npm:1.2.5"
     jsdom: "npm:25.0.1"
     react: "npm:19.0.0"
-    react-day-picker: "npm:8.10.1"
+    react-day-picker: "npm:9.4.3"
     react-dom: "npm:19.0.0"
     react-intl: "npm:7.0.4"
     react-json-view: "npm:1.21.3"
@@ -5045,7 +5052,7 @@ __metadata:
     newtype-ts: "npm:0.3.5"
     postcss: "npm:8.4.49"
     react: "npm:19.0.0"
-    react-day-picker: "npm:8.10.1"
+    react-day-picker: "npm:9.4.3"
     react-dom: "npm:19.0.0"
     react-intl: "npm:7.0.4"
     react-router-dom: "npm:7.0.2"
@@ -5102,7 +5109,7 @@ __metadata:
     less: "npm:4.2.1"
     postcss: "npm:8.4.49"
     react: "npm:19.0.0"
-    react-day-picker: "npm:8.10.1"
+    react-day-picker: "npm:9.4.3"
     react-dom: "npm:19.0.0"
     react-intl: "npm:7.0.4"
     storybook: "npm:8.4.7"
@@ -5249,7 +5256,7 @@ __metadata:
     playwright-core: "npm:1.49.1"
     postcss: "npm:8.4.49"
     react: "npm:19.0.0"
-    react-day-picker: "npm:8.10.1"
+    react-day-picker: "npm:9.4.3"
     react-dom: "npm:19.0.0"
     react-intl: "npm:7.0.4"
     react-router-dom: "npm:7.0.2"
@@ -13396,6 +13403,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"date-fns@npm:^4.1.0":
+  version: 4.1.0
+  resolution: "date-fns@npm:4.1.0"
+  checksum: 10/d5f6e9de5bbc52310f786099e18609289ed5e30af60a71e0646784c8185ddd1d0eebcf7c96b7faaaefc4a8366f3a3a4244d099b6d0866ee2bec80d1361e64342
+  languageName: node
+  linkType: hard
+
 "date-now@npm:1.0.1":
   version: 1.0.1
   resolution: "date-now@npm:1.0.1"
@@ -22821,6 +22835,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"react-day-picker@npm:9.4.3":
+  version: 9.4.3
+  resolution: "react-day-picker@npm:9.4.3"
+  dependencies:
+    "@date-fns/tz": "npm:^1.2.0"
+    date-fns: "npm:^4.1.0"
+  peerDependencies:
+    react: ">=16.8.0"
+  checksum: 10/14d142a911bd4123cca9d5f361f3be19e83c4d23ae59f28a9793b61018d3739ff367ce92fb01bb1ff3fad33d53508cce582eb344d2a3802ee8956634da9a8587
+  languageName: node
+  linkType: hard
+
 "react-docgen-typescript@npm:^2.2.2":
   version: 2.2.2
   resolution: "react-docgen-typescript@npm:2.2.2"