diff --git a/src/lib/date.js b/src/lib/date.js
index d89fc5e..a0b4068 100644
--- a/src/lib/date.js
+++ b/src/lib/date.js
@@ -1,5 +1,5 @@
 import dayjs from 'dayjs';
 
-export function reformatDate(dateStr, format) {
-  return dayjs(dateStr).format(format)
+export function reformatDate(dateStr, toFormat, fromFormat = 'YYYY-MM-DD') {
+  return dayjs(dateStr).format(toFormat)
 }
diff --git a/src/themes/reorx/index.ejs b/src/themes/reorx/index.ejs
index 1a88fac..1fc2916 100644
--- a/src/themes/reorx/index.ejs
+++ b/src/themes/reorx/index.ejs
@@ -274,7 +274,7 @@ function dateRange(item, level) {
     <div class="version">Version: <%= cv.meta.version %></div>
   <% } %>
   <% if (cv.meta.lastModified) { %>
-    <div class="version">Last modified: <%= cv.meta.lastModified %></div>
+    <div class="version">Last modified: <%= cv.meta.lastModified.slice(0, 10) %></div>
   <% } %>
 </footer>
 <% } %>