From 3d73d0c804a65084b3d92f75717a305f87fc232b Mon Sep 17 00:00:00 2001
From: co-sic <p.klein@gastromatic.de>
Date: Wed, 23 Oct 2024 17:18:56 +0200
Subject: [PATCH] fix: allow date below year 1000 for fromDateWithTimeZone

---
 src/CalendarDate.ts       |  4 +++-
 test/CalendarDate.test.ts | 15 +++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/CalendarDate.ts b/src/CalendarDate.ts
index 080cd69..fdada31 100644
--- a/src/CalendarDate.ts
+++ b/src/CalendarDate.ts
@@ -146,7 +146,9 @@ export class CalendarDate {
    * returns a CalendarDate instance for the supplied Date, using the supplied time zone string
    */
   static fromDateWithTimeZone(date: Date, timeZone: string): CalendarDate {
-    return new CalendarDate(CalendarDate.getIntlDateTimeFormatter(timeZone).format(date));
+    return new CalendarDate(
+      CalendarDate.getIntlDateTimeFormatter(timeZone).format(date).padStart(10, '0'),
+    );
   }
 
   /**
diff --git a/test/CalendarDate.test.ts b/test/CalendarDate.test.ts
index c5a1842..51bac07 100644
--- a/test/CalendarDate.test.ts
+++ b/test/CalendarDate.test.ts
@@ -216,6 +216,21 @@ describe('CalendarDate', () => {
     });
   });
 
+  describe('Test of fromDateWithTimeZone', () => {
+    test('should return correct date for a year < 1000', () => {
+      // Arrange
+      const date = new Date(50, 0, 1);
+
+      // Act
+      const calendarDate = CalendarDate.fromDateWithTimeZone(date, 'America/New_York');
+
+      // Assert
+      expect(calendarDate.toFormat('d.M.yyyy')).toBe(
+        date.toLocaleDateString('de-DE', { timeZone: 'America/New_York' }),
+      );
+    });
+  });
+
   describe('Test of parseString', () => {
     test('Should throw error if input is not a valid iso string', () => {
       fc.assert(