diff --git a/src/vs/workbench/contrib/extensions/browser/extensionEditor.ts b/src/vs/workbench/contrib/extensions/browser/extensionEditor.ts
index e9a2bb1d5f3..dfbc2063d48 100644
--- a/src/vs/workbench/contrib/extensions/browser/extensionEditor.ts
+++ b/src/vs/workbench/contrib/extensions/browser/extensionEditor.ts
@@ -946,7 +946,7 @@ export class ExtensionEditor extends EditorPane {
 		const moreInfoContainer = append(container, $('.more-info-container.additional-details-element'));
 		append(moreInfoContainer, $('.additional-details-title', undefined, localize('Marketplace Info', "More Info")));
 		const moreInfo = append(moreInfoContainer, $('.more-info'));
-		const toDateString = (date: Date) => `${date.getFullYear()}-${date.getMonth() + 1}-${date.getDate()}, ${date.toLocaleTimeString(language, { hourCycle: 'h23' })}`;
+		const toDateString = (date: Date) => `${date.getFullYear()}-${String(date.getMonth() + 1).padStart(2, '0')}-${String(date.getDate()).padStart(2, '0')}, ${date.toLocaleTimeString(language, { hourCycle: 'h23' })}`;
 		if (gallery) {
 			append(moreInfo,
 				$('.more-info-entry', undefined,