Your example uses the MDY
(Month before Day) styled date. So you would need something like
SET DateStyle TO MDY;
But generally, it's more safe to use the ISO
format. Try to pass that format first, and if you can't you could use the to_timestamp()
function for converting between formats.
SELECT to_timestamp('4/25/2014 5:29:37 PM', 'MM/DD/YYYY HH:MI:SS AM');