[tz] [tz-announce] 2018f release of tz code and data available
sla at ucolick.org
Sun Oct 21 03:00:12 UTC 2018
On Sat 2018-10-20T21:55:50+0100 Stephen Colebourne hath writ:
> The java.time.* code exposes the local time that the transition occurs.
> This can be represented within the bounds 00:00 to 24:00. There is no way
> to represent 25:00 or negatives.
Many examples of non-normalized dates and times exist in historical
literature. One example is 1970 January -1 and December 35 at
The subsequent page has January -6 and December 40, and not to be
forgotten in other civil use was 1712 February 30
> As such, the tzdb parser would have to convert 25:00 and try to reinterpret
> it as the next day within the valid bounds, which is far from ideal. It
> would be much better for the upstream source to represent the data in a
> more standard and backwards compatible way.
People did these sorts of things, and not just in astronomy. The
choice is whether or not a modern parser will be able to read what
people actually did or go into a mode resembling denial.
Steve Allen <sla at ucolick.org> WGS-84 (GPS)
UCO/Lick Observatory--ISB 260 Natural Sciences II, Room 165 Lat +36.99855
1156 High Street Voice: +1 831 459 3046 Lng -122.06015
Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m
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