Importantly, these “date-like” things have important date-semantics. That is, it may be reasonable to expect your software to be able to handle varieties of pre

Importantly, these “date-like” things have important date-semantics. That is, it may be reasonable to expect your software to be able to handle varieties of precision or completeness of date metadata, in which case your date representation may need to be able to interact with DateTime fluidly without actually being one itself, despite it being tempting to remove these possibilities by making incomplete date information unrepresentable.