Timestamps: Emit in UTC

Author: simolus3

.changeset/rare-cobras-post.md

@@ -0,0 +1,5 @@
+---
+'@powersync/mysql-zongji': minor
+---
+
+When the option to render timestamps as strings is enabled, unconditionally emit those values in UTC for consistency.

lib/datetime_decode.js

@@ -99,14 +99,15 @@ exports.getTimeStamp = function (
   if (secondsFromEpoch === 0 && (!fraction || fraction.value === 0)) {
     return '0000-00-00 00:00:00' + getFractionString(fraction);
   }
+
   return (
-    getDateString(dateObject.getFullYear(), dateObject.getMonth() + 1, dateObject.getDate()) +
+    getDateString(dateObject.getUTCFullYear(), dateObject.getUTCMonth() + 1, dateObject.getUTCDate()) +
     ' ' +
-    common.zeroPad(dateObject.getHours(), 2) +
+    common.zeroPad(dateObject.getUTCHours(), 2) +
     ':' +
-    common.zeroPad(dateObject.getMinutes(), 2) +
+    common.zeroPad(dateObject.getUTCMinutes(), 2) +
     ':' +
-    common.zeroPad(dateObject.getSeconds(), 2) +
+    common.zeroPad(dateObject.getUTCSeconds(), 2) +
     getFractionString(fraction)
   );
 };