wrong date format exception

[garaboncias]

Thank you for your work.

Please make optional the strong validation in the constructor.
I mean in the real word wrong date format is happen and you do not have control over it. In this case it would beneficiary just leave that field out from parsing instead of drop everything with a wrong date format exception.
I mean the best would be in such case
ParsedElement.type should be "error" and
ParsedElement.data should be null
but ParsedElement.dataString should be the original value.

if you would like it I could create an MR for it