diff --git a/horizon/templates/horizon/common/_usage_summary.html b/horizon/templates/horizon/common/_usage_summary.html
index 256ce1c45..8a50d70eb 100644
--- a/horizon/templates/horizon/common/_usage_summary.html
+++ b/horizon/templates/horizon/common/_usage_summary.html
@@ -14,7 +14,7 @@
       <label>To:</label>{{ end }}{% endblocktrans %}
     </div>
     <button class="btn btn-primary" type="submit">{% trans "Submit" %}</button>
-    <small>{% trans "The date should be in YYYY-mm-dd format." %}</small>
+    <small>{% trans "The date should be in YYYY-MM-DD format." %}</small>
   </form>
   <p id="activity">
     <span><strong>{% trans "Active Instances:" %}</strong> {{ usage.summary.instances|default:'0' }}</span>