diff --git a/.eleventy.js b/.eleventy.js
index 1395cf3..0a80f32 100644
--- a/.eleventy.js
+++ b/.eleventy.js
@@ -15,8 +15,6 @@ module.exports = function (eleventyConfig) {
     "node_modules/simpledotcss/simple.css": "css/simple.css",
   });
 
-  eleventyConfig.addFilter("makeRfc822Date", function (value) {
-    return new Date(value).toUTCString();
   });
   eleventyConfig.addFilter("formatDatetimeForHumans", function (value) {
     const dt = new Date(value);