How do you format a date for saving with users/saveUser on the front end? Currently using a date picker to select a date and submit it on user registration, formatted as m/d/Y, have played with various formats but can't one that works. 

Any ideas?
Craft stores dates in the database in the following format:

Y-m-d H:i:s


So submitting the date in this format should work, for example:

2014-06-24 23:30:00


It should also be possible to split the date and time into individual fields as follows:

&lt;input type="text" name="fields[customFieldName][date]" value="2014-06-24" /&gt;
&lt;input type="text" name="fields[customFieldName][time]" value="23:30:00" /&gt;