I saw this question in an old thread [ http://tinyurl.com/s7rru ] and since this might come up again I thought I'd post it up.
TYPO3 4.* comes with US date format available for setting BUT if you use the most useful Date2Calendar ( erotea_date2cal ) extension it doesn't work properly out of the box.
All you have to do to fix this is update $php_date and $js_date to US date format (m-d-y) in class.ux_t3lib_tceforms.php in that extensions folder between lines 50 and 54.
Note: I have the [ddmmyy] setting in the install tool set to m-d-y and [USdateFormat] option checked.
TYPO3 4.* comes with US date format available for setting BUT if you use the most useful Date2Calendar ( erotea_date2cal ) extension it doesn't work properly out of the box.
All you have to do to fix this is update $php_date and $js_date to US date format (m-d-y) in class.ux_t3lib_tceforms.php in that extensions folder between lines 50 and 54.
Note: I have the [ddmmyy] setting in the install tool set to m-d-y and [USdateFormat] option checked.