📆 Show date as UTC date (#310)

See jupyter-book/mystmd#607
jupyter-book · Jan 23, 2024 · a62438c · a62438c
1 parent 855f29e
commit a62438c
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diff --git a/.changeset/wise-lizards-cheat.md b/.changeset/wise-lizards-cheat.md
@@ -0,0 +1,5 @@
+---
+'@myst-theme/frontmatter': patch
+---
+
+Show date as UTC date
diff --git a/packages/frontmatter/src/FrontmatterBlock.tsx b/packages/frontmatter/src/FrontmatterBlock.tsx
@@ -74,7 +74,9 @@ export function DateString({
   spacer?: boolean;
 }) {
   if (!date) return null;
-  const dateString = new Date(date).toLocaleDateString('en-US', format);
+  const d = new Date(date); // This is in the users timezone
+  const utcDate = new Date(d.getUTCFullYear(), d.getUTCMonth(), d.getUTCDate());
+  const dateString = utcDate.toLocaleDateString('en-US', format);
   return (
     <time dateTime={date} className={classNames({ 'text-spacer': spacer })}>
       {dateString}