No way tell the difference between datetime(0,0) and 0.0

[chfw]

AssertionError: OrderedDict([('Sheet1', [['Date', 'Time'], [41998.0, 0.466099537037037], [41999.0, 0.508472222222222], [42005.0, 0.550844907407407], [0.0, 0.0]]), ('Sheet2', []), ('Sheet3', [])]) != OrderedDict([('Sheet1', [['Date', 'Time'], [datetime.datetime(2014, 12, 25, 0, 0), datetime.time(11, 11, 11)], [datetime.datetime(2014, 12, 26, 0, 0), datetime.time(12, 12, 12)], [datetime.datetime(2015, 1, 1, 0, 0), datetime.time(13, 13, 13)], [datetime.datetime(1899, 12, 30, 0, 0), datetime.time(0, 0)]]), ('Sheet2', []), ('Sheet3', [])])

https://travis-ci.org/pyexcel/pyexcel-xlsbr/jobs/411825607

A difference flag is required to say this cell is date, time field, instead of a number or float. Hence the issue was raised here