Fix handling of non-default date formats (#1489294)

- remove ambiguous m/d/Y format from default config

1 files changed, 2 insertions, 1 deletions

diff --git a/config/defaults.inc.php b/config/defaults.inc.php
index f48827eb9..54d0b1d27 100644
--- a/config/defaults.inc.php
+++ b/config/defaults.inc.php
@@ -478,7 +478,8 @@ $config['language'] = null;
 $config['date_format'] = 'Y-m-d';
 
 // give this choice of date formats to the user to select from
-$config['date_formats'] = array('Y-m-d', 'd-m-Y', 'Y/m/d', 'm/d/Y', 'd/m/Y', 'd.m.Y', 'j.n.Y');
+// Note: do not use ambiguous formats like m/d/Y
+$config['date_formats'] = array('Y-m-d', 'Y/m/d', 'Y.m.d', 'd-m-Y', 'd/m/Y', 'd.m.Y', 'j.n.Y');
 
 // use this format for time display (date or strftime format)
 $config['time_format'] = 'H:i';