Set request timezone to match browser

app/javascript/controllers/timezone_cookie_controller.js

@@ -0,0 +1,12 @@
+import { Controller } from "@hotwired/stimulus"
+
+export default class extends Controller {
+  connect() {
+    this.#setTimezoneCookie()
+  }
+
+  #setTimezoneCookie() {
+    const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone
+    document.cookie = `timezone=${encodeURIComponent(timezone)}; path=/`
+  }
+}