From a8f160fa977075f981c74bff2a68abb99c98f04d Mon Sep 17 00:00:00 2001
From: "Christoph M. Becker" <cmbecker69@gmx.de>
Date: Fri, 1 Oct 2021 15:33:54 +0200
Subject: [PATCH] Fix #62476: DateTime::createFromFormat z format incorrect wrt
 29.02

While this is only a hard requirement as of PHP 8.0.10, without an
explicit year before the day-of-year, previous versions always assumed
on non leap year, as Derick pointed out in chat, so users need the
explicit year anyway for correct code.
---
 reference/datetime/datetime/createfromformat.xml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/reference/datetime/datetime/createfromformat.xml b/reference/datetime/datetime/createfromformat.xml
index 11fb088db1..e46713cd04 100644
--- a/reference/datetime/datetime/createfromformat.xml
+++ b/reference/datetime/datetime/createfromformat.xml
@@ -86,7 +86,10 @@
          </row>
          <row>
           <entry><literal>z</literal></entry>
-          <entry>The day of the year (starting from 0)</entry>
+          <entry>
+           The day of the year (starting from 0);
+           must be preceeded by <literal>Y</literal> or <literal>y</literal>.
+          </entry>
           <entry><literal>0</literal> through <literal>365</literal></entry>
          </row>
          <row>