Use browser default time and number formatting with polyfills if needed (#9481)

Co-authored-by: Paulus Schoutsen <balloob@gmail.com>

test/common/datetime/format_date.ts

@@ -0,0 +1,19 @@
+import { assert } from "chai";
+
+import { formatDate } from "../../../src/common/datetime/format_date";
+import { NumberFormat, TimeFormat } from "../../../src/data/translation";
+
+describe("formatDate", () => {
+  const dateObj = new Date(2017, 10, 18, 11, 12, 13, 1400);
+
+  it("Formats English dates", () => {
+    assert.strictEqual(
+      formatDate(dateObj, {
+        language: "en",
+        number_format: NumberFormat.language,
+        time_format: TimeFormat.language,
+      }),
+      "November 18, 2017"
+    );
+  });
+});