[LEAPSECS] one second tolerance

Ian Batten igb at batten.eu.org
Wed Feb 9 01:25:25 EST 2011

On 9 Feb 2011, at 03:31, Tom Van Baak wrote:

>> Note that they require "Eastern Military (24 hour clock) Time", not UTC.


> Do these really differ fundamentally?

> I'm assuming you can subtract 5 hours (or 4 for DST) by hand.

Although that mandates access to a continuously reliable source of DST changeover dates and offsets. It also opens the interesting question of what timestamps mean in a non-monotonic timescale: during the autumn change, a hour is repeated. So as far as a clock ticking civil time is concerned, you have 0100 through 0200 twice, once a year. Events stamped 0130.01 and 0130.02 could be an hour and a second apart.


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