Re: The MS patch is to use code for a small data change that holds new era name
<iNo-one should be storing dates in as Heisei nn, but I wouldn't put it past Japanese programmers to have actually done so.</i>
Yes, and even if no one were storing dates in Heisei form, there would be applications which process documents using that form. There will be a need to handle Heisei dates, including incorrect ones (H31 and later). Badly-formed inputs are a fact of life.