[time-nuts] WWV, WWVB and Daylight Savings Time

Bob kb8tq kb8tq at n1k.org
Fri Aug 24 14:57:11 EDT 2018


> On Aug 24, 2018, at 1:18 PM, Mark Sims <holrum at hotmail.com> wrote:
> Lady Heather has DST support code in it (in file heathmsc.cpp).   It supports  the current standard settings for several areas (US, Europe, Australia, New Zealand) or you can specify a custom DST rule.  The code is around 200 lines long... some of that is Heather-specific requirements.  It can also be simplified by not parsing the ASCII rule string and using hard coded values.
> Implementing and testing seamless DST adjustment is a bit of a pain...  particularly keeping the time correct during the hours before/after the switch.

Yet another reason to avoid closed source / packaged solutions ……


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