nanog mailing list archives

Re: "Permanent" DST


From: Jay Hennigan <jay () west net>
Date: Wed, 16 Mar 2022 12:58:23 -0700

On 3/16/22 10:41, Jay R. Ashworth wrote:

Have we not learned, yet, the "don't lie to the computers" rule?

How *would* the timezone libraries handle "DST always on"? They would still
have to flap, twice a year, right?

It depends. The easy ones have two settings with an optional third.

1. Offset from UTC
2. DST yes/no
3. Specify date and time to switch DST on/off.

Setting 3's default was tweaked in 2007 in the US when DST was expanded.

Easy-peasy. Set the appropriate offset in option 1 and set option 2 to No. Option 3 is irrelevant.

Some systems are dumbed-down with drop-down menus listing cities like "Americas-Los Angeles" and similar. These will require a bit of work on the back end.

--
Jay Hennigan - jay () west net
Network Engineering - CCIE #7880
503 897-8550 - WB6RDV


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