diff --git a/templates/shared-utils.tpl.html b/templates/shared-utils.tpl.html
index 4ed3e3f..bef556e 100644
--- a/templates/shared-utils.tpl.html
+++ b/templates/shared-utils.tpl.html
@@ -49,6 +49,11 @@
 <!--% iso8601_date.format(date_to_format) %-->
 <!--% END %-->
 
+<!--% MACRO day_from_date(eps_date) BLOCK %-->
+<!--% USE eps_day = date(format => '%A', locale => 'en_US', gmt => 1)  %-->
+<!--% eps_date = "$eps_date 0:0:0"; eps_day.format(eps_date) %-->
+<!--% END %-->
+
 <!--% MACRO tag_to_id(tag, is_index) BLOCK %-->
 <!--% tag = tag.replace('\s+','_') %-->
 <!--% IF is_index %-->