diff --git a/js/date-fmt.js b/js/date-fmt.js
new file mode 100644
index 0000000..521f206
--- /dev/null
+++ b/js/date-fmt.js
@@ -0,0 +1,10 @@
+document.addEventListener("DOMContentLoaded", () => {
+  const timestampSpans = document.getElementsByClassName("timestamp");
+  for (let timestampSpan of timestampSpans) {
+    const timestamp = parseInt(timestampSpan.dataset.utc);
+    if (!isNaN(timestamp)) {
+      const date = new Date(timestamp * 1000);
+      timestampSpan.textContent = date.toLocaleString();
+    }
+  }
+})
diff --git a/views/base.etlua b/views/base.etlua
index a50f454..5da0af2 100644
--- a/views/base.etlua
+++ b/views/base.etlua
@@ -17,5 +17,6 @@
     </span>
   </footer>
   <script src="/static/js/copy-code.js"></script>
+  <script src="/static/js/date-fmt.js"></script>
 </body>
 </html>
diff --git a/views/common/timestamp.etlua b/views/common/timestamp.etlua
new file mode 100644
index 0000000..1649021
--- /dev/null
+++ b/views/common/timestamp.etlua
@@ -0,0 +1 @@
+<span class="timestamp" data-utc="<%= timestamp %>"><%= os.date("%c", timestamp) %></span>
\ No newline at end of file
diff --git a/views/threads/post.etlua b/views/threads/post.etlua
index 4288fc9..1f39934 100644
--- a/views/threads/post.etlua
+++ b/views/threads/post.etlua
@@ -22,9 +22,9 @@
       %>
       <a href="<%= post_url %>" title="Permalink"><i>
         <% if tonumber(post.edited_at) > tonumber(post.created_at) then -%>
-          Edited at <%= os.date("%c", post.edited_at) %>
+          Edited at <% render("views.common.timestamp", {timestamp = post.edited_at}) -%>
         <% else -%>
-          Posted on <%= os.date("%c", post.created_at) %>
+          Posted on <% render("views.common.timestamp", {timestamp = post.created_at}) -%>
         <% end -%>
       </i></a>
       <span>
@@ -47,8 +47,8 @@
         end
         if show_reply then
           local d = post.created_at < post.edited_at and post.edited_at or post.created_at
-          local quote_src_text = ("On [url=%s]%s[/url], [url=%s]%s[/url] said:"):format(
-            post_url, os.date("%c", d), url_for("user", {username = post.username}), post.username
+          local quote_src_text = ("[url=%s]%s said:[/url]"):format(
+            post_url, post.username
           )
           local reply_text = ("%s\n[quote]%s[/quote]\n---\n\n"):format(quote_src_text, post.original_markup)
         %>
diff --git a/views/topics/topic.etlua b/views/topics/topic.etlua
index f6fde8b..d4cc1a7 100644
--- a/views/topics/topic.etlua
+++ b/views/topics/topic.etlua
@@ -48,11 +48,11 @@
           <span class="thread-title"><a href="<%= url_for("thread", {slug = thread.slug}) %>"><%= thread.title %></a></span>
           &bullet;
           Started by <a href=<%= url_for("user", {username = thread.started_by}) %>><%= thread.started_by %></a>
-          on <%= os.date("%c", thread.created_at) %>
+          on <% render("views.common.timestamp", {timestamp = thread.created_at}) -%>
         </span>
         <span>
           Latest post by <a href="<%= url_for("user", {username = thread.latest_post_username}) %>"><%= thread.latest_post_username %></a>
-          <a href="<%= url_for("thread", {slug = thread.slug}, {after = thread.latest_post_id}) .. "#post-" .. thread.latest_post_id %>">on <%= os.date("%c", thread.latest_post_created_at) %></a>:
+          <a href="<%= url_for("thread", {slug = thread.slug}, {after = thread.latest_post_id}) .. "#post-" .. thread.latest_post_id %>">on <% render("views.common.timestamp", {timestamp = thread.latest_post_created_at}) -%></a>:
         </span>
         <span class="thread-info-post-preview">
           <%- thread.latest_post_content %>
diff --git a/views/topics/topics.etlua b/views/topics/topics.etlua
index 950e3ed..95d3d35 100644
--- a/views/topics/topics.etlua
+++ b/views/topics/topics.etlua
@@ -21,7 +21,7 @@
         <%= topic.description %>
         <% if topic.latest_thread_username then %>
         <span>
-          Latest thread: <a href="<%= url_for("thread", {slug = topic.latest_thread_slug}) %>"><%= topic.latest_thread_title %></a> by <a href="<%= url_for("user", {username = topic.latest_thread_username}) %>"><%= topic.latest_thread_username %></a> on <%= os.date("%c", topic.latest_thread_created_at) %>
+          Latest thread: <a href="<%= url_for("thread", {slug = topic.latest_thread_slug}) %>"><%= topic.latest_thread_title %></a> by <a href="<%= url_for("user", {username = topic.latest_thread_username}) %>"><%= topic.latest_thread_username %></a> on <% render("views.common.timestamp", {timestamp = topic.latest_thread_created_at}) -%>
         </span>
         <% else %>
         <i>No threads yet.</i>
diff --git a/views/user/user.etlua b/views/user/user.etlua
index f0dc350..c73ee36 100644
--- a/views/user/user.etlua
+++ b/views/user/user.etlua
@@ -27,9 +27,9 @@
       <div class="post-info">
         <div><a href="<%= url_for("thread", {slug = post.thread_slug}, {after = post.id}) .. "#post-" .. post.id %>" title="Permalink"><i>
         <% if tonumber(post.edited_at) > tonumber(post.created_at) then -%>
-            Edited in <%= post.thread_title %> at <%= os.date("%c", post.edited_at) %>
+            Edited in <%= post.thread_title %> at <% render("views.common.timestamp", {timestamp = post.edited_at}) -%>
           <% else -%>
-            Posted in <%= post.thread_title %> on <%= os.date("%c", post.created_at) %>
+            Posted in <%= post.thread_title %> on <% render("views.common.timestamp", {timestamp = post.created_at}) -%>
           <% end -%>
       </i></a></div>
       </div>
@@ -48,12 +48,12 @@
   <div class="darkbg">
     <h1>Moderator controls</h2>
     <% if user:is_guest() then %>
-      <p>This user is a guest. They signed up on <%= os.date("%c", user.created_at) %>.</p>
+      <p>This user is a guest. They signed up on <% render("views.common.timestamp", {timestamp = user.created_at}) -%>.</p>
       <form class="modform" method="post" action="<%= url_for("confirm_user", {user_id = user.id}) %>">
         <input type="submit" value="Confirm user">
       </form>
     <% else %> <% --[[ user is not guest ]] %>
-      <p>This user signed up on <%= os.date("%c", user.created_at) %> and was confirmed on <%= os.date("%c", user.confirmed_on) %>.</p>
+      <p>This user signed up on <% render("views.common.timestamp", {timestamp = user.created_at}) -%> and was confirmed on <% render("views.common.timestamp", {timestamp = user.confirmed_on}) %>.</p>
       <% if user.permission < me.permission then %>
       <form class="modform" method="post" action="<%= url_for("guest_user", {user_id = user.id}) %>">
         <input class="warn" type="submit" value="Demote user to guest (soft ban)">