Build date consistently (in term of tz) when executing some embedded JS (bug 1934157)

The date was create in UTC+0 and then amended in using set-Month/Date which take into account
the user timezone.
With this patch we build all the date in the user timezone.

test/integration/scripting_spec.mjs

@@ -2522,4 +2522,42 @@ describe("Interaction", () => {
       );
     });
   });
+
+  describe("Date creation must be timezone consistent", () => {
+    let pages;
+
+    beforeAll(async () => {
+      pages = await loadAndWait("bug1934157.pdf", "[data-annotation-id='24R']");
+    });
+
+    afterAll(async () => {
+      await closePages(pages);
+    });
+
+    it("must check that date entered by the user is consistent", async () => {
+      await Promise.all(
+        pages.map(async ([browserName, page]) => {
+          if (browserName === "firefox") {
+            // Skip the test for Firefox as it doesn't support the timezone
+            // feature yet with BiDi.
+            // See https://github.com/puppeteer/puppeteer/issues/13344.
+            // TODO: Remove this check once the issue is fixed.
+            return;
+          }
+
+          await waitForScripting(page);
+
+          await page.emulateTimezone("Pacific/Honolulu");
+
+          const expectedDate = "02/01/2000";
+          await page.type(getSelector("24R"), expectedDate);
+          await page.click(getSelector("25R"));
+          await waitForSandboxTrip(page);
+
+          const date = await page.$eval(getSelector("24R"), el => el.value);
+          expect(date).withContext(`In ${browserName}`).toEqual(expectedDate);
+        })
+      );
+    });
+  });
 });

test/pdfs/.gitignore

@@ -683,3 +683,4 @@
 !issue18956.pdf
 !issue19083.pdf
 !issue19120.pdf
+!bug1934157.pdf

test/unit/scripting_spec.js

@@ -245,10 +245,10 @@ describe("Scripting", function () {
         expect(new Date(value)).toEqual(date);
 
         value = await myeval(`util.scand("mmddyyyy", "07/15/2007").toString()`);
-        expect(new Date(value)).toEqual(new Date("07/15/2007"));
+        expect(new Date(value)).toEqual(new Date("07/15/2007 12:00:00"));
 
         value = await myeval(`util.scand("mmddyyyy", "07a15b2007").toString()`);
-        expect(new Date(value)).toEqual(new Date("07/15/2007"));
+        expect(new Date(value)).toEqual(new Date("07/15/2007 12:00:00"));
       });
     });
 
@@ -630,8 +630,9 @@ describe("Scripting", function () {
           );
         };
 
-        await check("05", "dd", "2000/01/05");
-        await check("12", "mm", "2000/12/01");
+        const year = new Date().getFullYear();
+        await check("05", "dd", `${year}/01/05`);
+        await check("12", "mm", `${year}/12/01`);
         await check("2022", "yyyy", "2022/01/01");
         await check("a1$9bbbb21", "dd/mm/yyyy", "2021/09/01");
         await check("1/2/2024", "dd/mm/yyyy", "2024/02/01");