A blank except will catch things like `KeyboardInterrupt` (ctrl-c), which can be a minor annoyance up to a major pain depending.

At the very least based on the [exception hierarchy](http://docs.python.org/2/library/exceptions.html#exception-hierarchy), it should probably be `except StandardError`.

It may also be good to move the try/except into the `date_from_adzerk` function.