I just found a case where QDateTime::fromString() fails to parse date and time formats that use spaces for padding. For example "Feb 3 2014 15:15:12" can not be parsed by QDateTime (please not the padded space before the day). This format is returned e.g. by __DATE__ macro (as provided by VC++) so it is actually used.

Please add an option to QDateTime::fromString() that allows specifying such a format or make the options that accept leading zeros more flexible by also accepting leading spaces.

(Clarification: in the given string, "Feb 3 …" has two spaces between Feb and 3, the second of which is the padding of 3 to fill a two-digit field. QDateTime::fromString() supports two-digit fields but expects single digit values in them to be zero-padded, not space-padded.)