Comment by malux85

Yeah this is the curse of the intermediate developer at work

The junior developer experiences nothing but errors, and struggles to get something over the line

The intermediate developer adopts “reduce errors at all cost” mentality and their parsers are too helpful, they make too many assumptions, and you end up with the Date class type behaviour.

The senior developer knows the deadliness of this, and designs a robust class that behaves consistently and errors early on invalid input.