diff --git a/magic_spoiler/__main__.py b/magic_spoiler/__main__.py
index e8060557..820aad28 100644
--- a/magic_spoiler/__main__.py
+++ b/magic_spoiler/__main__.py
@@ -209,6 +209,8 @@ def open_header(card_xml_file: IO[Any]) -> None:
     card_xml_file.write(
         "<cockatrice_carddatabase version='4' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='https://raw.githubusercontent.com/Cockatrice/Cockatrice/master/doc/carddatabase_v4/cards.xsd'>\n"
         + "  <!--\n"
+        + "  Created At: " + datetime.datetime.utcnow().strftime("%a, %b %d %Y, %H:%M:%S") + " (UTC)\n"
+        + "  \n"
         + "  THIS FILE IS AUTOMATICALLY GENERATED & ALL EDITS WILL BE OVERRIDDEN.\n"
         + "  -->\n"
         + "<info>\n"