[LEAPSECS] one second tolerance

Tony Finch dot at dotat.at
Wed Feb 9 07:02:47 EST 2011


On Wed, 9 Feb 2011, Ian Batten wrote:

>

> 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.


As far as I can tell from a brief look at the document, the accurate
timestamp requirement applies to trading data, and they don't trade when
there is a DST change or when leap seconds occur.

Tony.
--
f.anthony.n.finch <dot at dotat.at> http://dotat.at/
HUMBER THAMES DOVER WIGHT PORTLAND: NORTH BACKING WEST OR NORTHWEST, 5 TO 7,
DECREASING 4 OR 5, OCCASIONALLY 6 LATER IN HUMBER AND THAMES. MODERATE OR
ROUGH. RAIN THEN FAIR. GOOD.


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