diff --git a/packages/@internationalized/date/src/weekStartData.ts b/packages/@internationalized/date/src/weekStartData.ts
index 169f84ddaa4..b62277543d7 100644
--- a/packages/@internationalized/date/src/weekStartData.ts
+++ b/packages/@internationalized/date/src/weekStartData.ts
@@ -21,7 +21,9 @@ export const weekStartData = {
   AL: 1,
   AM: 1,
   AN: 1,
+  AR: 1,
   AT: 1,
+  AU: 1,
   AX: 1,
   AZ: 1,
   BA: 1,
@@ -34,6 +36,7 @@ export const weekStartData = {
   CH: 1,
   CL: 1,
   CM: 1,
+  CN: 1,
   CR: 1,
   CY: 1,
   CZ: 1,