fields.Date accepts input in non ISO8601 format. This leads to unaccepted behaviour.

The doc of fields.Date suggests that it accepts only ISO8601 date format.

class Date(Field):
    """ISO8601-formatted date string.
    :param kwargs: The same keyword arguments that :class:`Field` receives.
    """

It works with ISO8601 format fine:

In [2]: fields.Date().deserialize('2018-10-08')
Out[2]: datetime.date(2018, 10, 8)

However unfortunately it also works with non ISO8601 formats:

In [3]: fields.Date().deserialize('08-10-2018')
Out[3]: datetime.date(2018, 8, 10)

And in this case it seems like it parses the format as %m-%d-%Y I feel, it should raise a ValidationError with invalid_date format incase the input is not in the iso8601 format.

Digging further into the issue I found that DateField uses utils.from_iso_date; which inturn uses dateutil (if available) parser to parse the date. I think that util should be modified to use dateutil.parser.isoparse

[dushr]

@sloria Yup, I can do that.

[dushr]

👍 Will try to get this done by this weeekend