diff --git a/_components/header.tsx b/_components/header.tsx
index ee4285b..b52f05d 100644
--- a/_components/header.tsx
+++ b/_components/header.tsx
@@ -15,7 +15,7 @@ export default function(props: Props) {
       <h1>{ props.title }</h1>
       {props.author &&
         <p style={{ color: "var(--color-brown)" }}>
-          By {props.author.name} on <time datetime={props.date.toISOString()}>{dateFormatted}</time>
+          By {props.author.name} on <time dateTime={props.date.toISOString()}>{dateFormatted}</time>
         </p>
       }
       {props.comp.separator()}