I don't think it can recognize that, since different countries/regions have DST at different times? For example, US/Canada and Europe have 3 weeks each spring and 1 week each fall that they're 1 hour closer than the usual offset (on European sites that adjust for DST, the time is wrong for me for those 4 weeks per year). It's more complex for northern/southern hemisphere DST in opposite halves of the year.
Better for it to be adjusted twice per year everywhere that uses DST, than not at all in some places and 4 times per year in others, I think?
Side note, the one person who can make changes to this site's code (or enable others to) has been gone for 99+% of the last ~3 years and as far as I can tell is completely impossible to contact elsewhere, given the number of times/places I've tried. I still think it's worth discussing the site, but I'd be surprised if it leads to anything.