pydata/pandas — pull request #8061 by mortada (2014-08-18 18:32:43+00:00)
Title: ENH: improve datetime string parsing with CustomBusinessDay

Currently CustomBusinessDay requires a strict format for holiday definition

CustomBusinessDay(holidays=['2014-05-12'])

but the following would raise a ValueError:

CustomBusinessDay(holidays=['5/12/2014'])

this PR makes the date parsing easier and adds a unit test