diff --git a/reference/datetime/functions/date.xml b/reference/datetime/functions/date.xml
index f1bb60f7f2..d7c2f5ffe5 100644
--- a/reference/datetime/functions/date.xml
+++ b/reference/datetime/functions/date.xml
@@ -222,7 +222,8 @@
             <function>date</function> will always generate
             <literal>000000</literal> since it takes an <type>integer</type>
             parameter, whereas <methodname>DateTime::format</methodname> does
-            support microseconds.
+            support microseconds if <classname>DateTime</classname> was
+            created with microseconds.
            </entry>
            <entry>Example: <literal>654321</literal></entry>
           </row>