I remember many years ago, daylight savings time changed its start and end dates and it caused a fair amount of nuisance at the Philadelphia Stock Exchange, where I worked at the time, because our computer systems "knew" when it was supposed to change, and changed it then. Later, the systems didn't change it on the new date, as they didn't know they were supposed to. It was annoying. I just read that US lawmakers want to change the dates
again. I am curious about whether this is something that computers can adjust to easily no, or is it going to be a hassle again. Where are the dates coded into the system, and will they be updated by automatic updates in the case of Windows, for example? Also, do the start and end dates for daylight savings time vary in different time zones? What a mess.
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