Use UTC functions on date objects (#827)

Author: aditsachde

components/menu.tsx

@@ -83,7 +83,7 @@ function Level1({ href, menu }) {
       link = (
         <a href={entry.href}>
           <b>
-            {monthNames[date.getMonth()]} {date.getDate()}
+            {monthNames[date.getUTCMonth()]} {date.getUTCDate()}
           </b>
           {entry.title}
         </a>

lib/blog.ts

@@ -16,7 +16,7 @@ export function getBlogPostsByYear(limit?: number) {
       return years;
     }
     const date = new Date(post.date);
-    const year = date.getFullYear().toString();
+    const year = date.getUTCFullYear().toString();
     if (!years[year]) {
       years[year] = {
         key: year,