From the documentation from time.strptime() (which acts the same as
datetime.strptime()):

"Only the directives specified in the documentation [of time.strftime()]
are supported. Because strftime() is implemented per platform it can
sometimes offer more directives than those listed. But strptime() is
independent of any platform and thus does not necessarily support all
directives available that are not documented as supported."

So I think invalid.