diff --git a/app/templates/common/macros.html b/app/templates/common/macros.html
index 7520e04..50f235d 100644
--- a/app/templates/common/macros.html
+++ b/app/templates/common/macros.html
@@ -39,7 +39,7 @@
 {% endmacro %}
 
 {% macro timestamp(unix_ts) %}
-<span class="timestamp" data-utc="{{ unix_ts }}">{{ unix_ts | ts_datetime('%Y-%m-%d %H:%M')}} ST</span>
+<span class="timestamp" data-utc="{{ unix_ts }}">{{ unix_ts | ts_datetime('%Y-%m-%d %H:%M')}} <abbr title="Server Time">ST</abbr></span>
 {% endmacro %}
 
 {% macro babycode_editor_component(ta_name, ta_placeholder="Post body", optional=False, prefill="") %}