From 0af8ab3b84a375d3f076ef27974aa63125ad5c8a Mon Sep 17 00:00:00 2001
From: Kohei Yoshino <kohei.yoshino@gmail.com>
Date: Fri, 20 Dec 2024 16:58:07 -0500
Subject: [PATCH] Use UTC to fill date in entry slug

Fix #278
---
 src/lib/services/contents/entry/slug.js      |  2 +-
 src/lib/services/contents/entry/slug.spec.js | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/lib/services/contents/entry/slug.js b/src/lib/services/contents/entry/slug.js
index d3cdfecd..24645265 100644
--- a/src/lib/services/contents/entry/slug.js
+++ b/src/lib/services/contents/entry/slug.js
@@ -66,7 +66,7 @@ export const fillSlugTemplate = (
     currentSlug,
     entryFilePath,
     locale,
-    dateTimeParts = getDateTimeParts(),
+    dateTimeParts = getDateTimeParts({ timeZone: 'UTC' }),
   },
 ) => {
   const {
diff --git a/src/lib/services/contents/entry/slug.spec.js b/src/lib/services/contents/entry/slug.spec.js
index f9692b60..17ec97a7 100644
--- a/src/lib/services/contents/entry/slug.spec.js
+++ b/src/lib/services/contents/entry/slug.spec.js
@@ -1,3 +1,4 @@
+import { getDateTimeParts } from '@sveltia/utils/datetime';
 import { describe, expect, test } from 'vitest';
 import { siteConfig } from '$lib/services/config';
 import { fillSlugTemplate } from '$lib/services/contents/entry/slug';
@@ -45,6 +46,16 @@ describe('Test fillSlugTemplate()', () => {
     );
   });
 
+  test('date/time', () => {
+    // The time zone should be UTC, not local
+    const { year, month, day, hour, minute, second } = getDateTimeParts({ timeZone: 'UTC' });
+    const template = '{{year}}-{{month}}-{{day}}-{{hour}}-{{minute}}-{{second}}';
+
+    expect(fillSlugTemplate(template, { collection, content: {} })).toEqual(
+      `${year}-${month}-${day}-${hour}-${minute}-${second}`,
+    );
+  });
+
   test('random ID fallback', () => {
     expect(fillSlugTemplate('{{title}}', { collection, content: {} })).toMatch(/[0-9a-f]{12}/);
     expect(fillSlugTemplate('{{name}}', { collection, content: {} })).toMatch(/[0-9a-f]{12}/);