diff --git a/index.js b/index.js
index da4d6c8..755da78 100644
--- a/index.js
+++ b/index.js
@@ -213,7 +213,7 @@ function getPostTitle(post) {
 }
 
 function getPostDate(post) {
-	return luxon.DateTime.fromRFC2822(post.pubDate[0], { zone: 'utc' }).toISO();
+	return luxon.DateTime.fromRFC2822(post.pubDate[0], { zone: 'utc' }).toISODate();
 }
 
 function getPostContent(post, turndownService) {