Yeah, inventing an API and implementation of a date/time/calendar library from scratch without an existing spec, implementation, tests or experience will surely be totally bug-free.
I'm not saying it'll be bug-free. My point is that it'll have exactly the same bugs on either platform. This may be preferable to having different bugs on different platforms.
That's a good point. As a (shim) library developer I think I might agree -- because it would perhaps be easier to find bugs in my library -- as an application developer I wouldn't because I would have to find different workarounds for different bugs.
I'm not saying it'll be bug-free. My point is that it'll have exactly the same bugs on either platform. This may be preferable to having different bugs on different platforms.