Sorry, I was out of town for a bit and was unable to respond. FYI, I'm using a .NET library that is backed by the time zone database. Specifically I'm using my own branch of this: https://www.nuget.org/packages/Afk.ZoneInfo/ I installed the 2018e data myself so there is no distributor involved. I suspect that some will think that the problem must be in the code base. I think that's unlikely because the code base has not changed in years and works perfectly except for this one time zone. I'll see if I can run the test you suggest, but I don't currently have a Linux or Unix install handy and that looks like Unix to me. Running my own unit tests, btw, that is not the output I get. For Sun Mar 11 07:00:00 2018 UT using the 2018e data I get Sun Mar 11 02:00:00 2018 as the local Grand Turk time. So maybe it is a code issue. If I change line 3426 in the northamerica file to this: -4:00 US AST 2018 Mar 11 3:00 I get the correct result. On Tue, Jul 24, 2018 at 12:56 PM, Paul Eggert <eggert@cs.ucla.edu> wrote:
On 07/24/2018 08:00 AM, Robert MacGrogan wrote:
I'm definitely seeing incorrect behavior when I test dates in July of 2018.
How exactly are you testing that? Are you using the data installed by your distributor, or the actual 2018e data?
What happens when you do this from tzdb 2018e source?
rm -fr /tmp/tz make clean make TOPDIR=/tmp/tz install ./zdump -Vc 2018,2019 America/Grand_Turk
Here's the output that I get. If you get something different, please investigate.
America/Grand_Turk Sun Mar 11 06:59:59 2018 UT = Sun Mar 11 02:59:59 2018 AST isdst=0 gmtoff=-14400 America/Grand_Turk Sun Mar 11 07:00:00 2018 UT = Sun Mar 11 03:00:00 2018 EDT isdst=1 gmtoff=-14400 America/Grand_Turk Sun Nov 4 05:59:59 2018 UT = Sun Nov 4 01:59:59 2018 EDT isdst=1 gmtoff=-14400 America/Grand_Turk Sun Nov 4 06:00:00 2018 UT = Sun Nov 4 01:00:00 2018 EST isdst=0 gmtoff=-18000
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