def date_range_builder(self, start='2013-02-11', end=None):
        """
        Builds date range query.

        :param start:
            Date string. format: YYYY-MM-DD
        :type start:
            String
        :param end:
            date string. format: YYYY-MM-DD
        :type end:
            String

        :returns:
            String
        """
        if not end:
            end = time.strftime('%Y-%m-%d')

        return 'acquisitionDate:[%s+TO+%s]' % (start, end)
Builds date range query.

        :param start:
            Date string. format: YYYY-MM-DD
        :type start:
            String
        :param end:
            date string. format: YYYY-MM-DD
        :type end:
            String

        :returns:
            String