diff --git a/ui/src/lib/utils.ts b/ui/src/lib/utils.ts
index c56d3687..db66b3be 100644
--- a/ui/src/lib/utils.ts
+++ b/ui/src/lib/utils.ts
@@ -29,3 +29,20 @@ const twMerge = extendTailwindMerge({
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs));
 }
+
+// edge still uses the old one
+export function getWeekInfo() {
+  let locale = new Intl.Locale(navigator.language);
+
+  // @ts-ignore
+  if (locale.getWeekInfo) {
+    // @ts-ignore
+    return locale.getWeekInfo();
+    // @ts-ignore
+  } else if (locale.weekInfo) {
+    // @ts-ignore
+    return locale.weekInfo;
+  }
+
+  throw new Error("Could not fetch week info via new or old api");
+}
diff --git a/ui/src/state/store.ts b/ui/src/state/store.ts
index 3a843d35..1e835cbd 100644
--- a/ui/src/state/store.ts
+++ b/ui/src/state/store.ts
@@ -17,6 +17,7 @@ import {
 
 import { invoke } from "@tauri-apps/api/core";
 import { sessionToken, settings } from "./client";
+import { getWeekInfo } from "@/lib/utils";
 
 // I'll probs want to slice this up at some point, but for now a
 // big blobby lump of state is fine.
@@ -47,8 +48,7 @@ let state = (set: any, get: any): AtuinState => ({
   shellHistory: [],
   calendar: [],
 
-  // @ts-ignore
-  weekStart: new Intl.Locale(navigator.language).getWeekInfo().firstDay,
+  weekStart: getWeekInfo().firstDay,
 
   refreshAliases: () => {
     invoke("aliases").then((aliases: any) => {