[time-nuts] When does NIST change to DST?

Andy AI.egrps+tn at gmail.com
Mon Mar 14 23:23:18 EDT 2016


Yes, what I meant by "switch to DST" was that it flips the DST bit.
Not that the timecode itself changes.

Since the time many clocks use to sync up with WWVB is (from what I
recall) around 2AM, it seems kind of dicey whether they would make the
change on the right day.

I think that doesn't explain the change happening at 2000J -- unless
your receiver was receiving and syncing to WWVB at that time and they
had already flipped the bit.

Andy


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