I have in cell p4 the date: 2014-01-01 (obtained via formula (=(((O5/1000/60)/60)/24)+DATE(1970,1,1)))
2014-01-01
=(((O5/1000/60)/60)/24)+DATE(1970,1,1))
I have in cell b5 the date: 2014-0
2014-0
Perhaps there is a more appropriate comparison format, when you have dates in the format YYYY-MM-DD I think this one will work).