I have been developing a script on my linux box for quite some time, and wanted to run it on my Mac as well.
I thought that the functions on the Mac were the same as
man date indicates that it doesn't go beyond one second. I would recommend trying another language (Python 2):
man date
$ python -c 'import time; print repr(time.time())' 1332334298.898616
For Python 3, use:
$ python -c 'import time; print(repr(time.time()))'