From 9eda673c09ebc32137c4d3f7aa112c6ab1b51336 Mon Sep 17 00:00:00 2001
From: Kurt Thiemann <kurt@aternos.org>
Date: Mon, 27 Jun 2022 14:08:43 +0200
Subject: [PATCH] use UTC values for msdos timestamps

---
 package.json                |  2 +-
 src/Util/MsDosTime.js       | 17 ++++++++++-------
 test/util.msdostime.test.js |  2 +-
 3 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/package.json b/package.json
index 71f3db3..60f1fdd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "armarius",
-  "version": "1.3.7",
+  "version": "1.3.8",
   "description": "A JavaScript library to read, write, and merge ZIP archives in web browsers.",
   "repository": "github:aternosorg/armarius",
   "type": "module",
diff --git a/src/Util/MsDosTime.js b/src/Util/MsDosTime.js
index 9e63810..85fe78e 100644
--- a/src/Util/MsDosTime.js
+++ b/src/Util/MsDosTime.js
@@ -11,9 +11,9 @@ export default class MsDosTime {
     static encodeTime(date) {
         date = this.clampDate(date);
         let res = 0;
-        res |= Math.floor(date.getSeconds() / 2) & 0b11111;
-        res |= (date.getMinutes() & 0b111111) << 5;
-        res |= (date.getHours() & 0b11111) << 11;
+        res |= Math.floor(date.getUTCSeconds() / 2) & 0b11111;
+        res |= (date.getUTCMinutes() & 0b111111) << 5;
+        res |= (date.getUTCSeconds() & 0b11111) << 11;
         return res;
     }
 
@@ -26,9 +26,9 @@ export default class MsDosTime {
     static encodeDate(date) {
         date = this.clampDate(date);
         let res = 0;
-        res |= date.getDate() & 0b11111;
-        res |= ((date.getMonth() + 1) & 0b1111) << 5;
-        res |= ((date.getFullYear() - 1980) & 0b1111111) << 9;
+        res |= date.getUTCDate() & 0b11111;
+        res |= ((date.getUTCMonth() + 1) & 0b1111) << 5;
+        res |= ((date.getUTCFullYear() - 1980) & 0b1111111) << 9;
         return res;
     }
 
@@ -45,7 +45,10 @@ export default class MsDosTime {
             month = ((date >> 5) & 0b1111) + 1,
             year = (date >> 9) + 1980;
 
-        return new Date(year, month, day, hours, minutes, seconds, 0);
+        let res = new Date();
+        res.setUTCFullYear(year, month, day);
+        res.setUTCHours(hours, minutes, seconds, 0);
+        return res;
     }
 
     /**
diff --git a/test/util.msdostime.test.js b/test/util.msdostime.test.js
index daaac3f..522d3ba 100644
--- a/test/util.msdostime.test.js
+++ b/test/util.msdostime.test.js
@@ -4,7 +4,7 @@ const timestamp = 1655914036349;
 const roundedTimestamp = 1661184436000;
 const date = new Date(timestamp);
 
-let timeValue = 37096;
+let timeValue = 33000;
 let dateValue = 21718;
 
 test('Encode date value', () => {