[tz] Epic fail for DST fallback in hospital health records

Guy Harris guy at alum.mit.edu
Thu Nov 8 08:26:35 UTC 2018

On Nov 7, 2018, at 9:52 PM, Michael Douglass <mikeadouglass at gmail.com> wrote:

> As ever it's not as simple as that. Much of this software comes from mainframe days when these problems were not so 'well known'.

Daylight Savings Time was "well known" long before computers were used for hospital record keeping.

> I doubt there were any specifications and nobody thought about transferring patients across timezones.

This isn't an issue of transferring patients across timezones.  It's an issue of "what happens when the clock gets turned back?"

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