[R] Timezone problem with 3.4.2

R. Mark Sharp rmsharp at me.com
Fri Dec 1 03:42:29 CET 2017

From Peter Dalgaard announcement earlier today.



   * A workaround has been added for the changes in location of
     time-zone files in macOS 10.13 'High Sierra' and again in
     10.13.1, so the default time zone is deduced correctly from the
     system setting when R is configured with --with-internal-tzcode
     (the default on macOS).

R. Mark Sharp, Ph.D.
Data Scientist and Biomedical Statistical Consultant
7526 Meadow Green St.
San Antonio, TX 78251
mobile: 210-218-2868
rmsharp at me.com

> On Nov 30, 2017, at 8:37 PM, Dennis Fisher <fisher at plessthan.com> wrote:
> Colleagues
> I just installed 3.4.2 on a Mac running High Sierra.
> I encountered the following:
> R version 3.4.2 (2017-09-28) -- "Short Summer"
> Copyright (C) 2017 The R Foundation for Statistical Computing
> Platform: x86_64-apple-darwin15.6.0 (64-bit)
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under certain conditions.
> Type 'license()' or 'licence()' for distribution details.
>  Natural language support but running in an English locale
> R is a collaborative project with many contributors.
> Type 'contributors()' for more information and
> 'citation()' on how to cite R or R packages in publications.
> Type 'demo()' for some demos, 'help()' for on-line help, or
> 'help.start()' for an HTML browser interface to help.
> Type 'q()' to quit R.
>> Sys.Date()
> [1] "2017-12-01"
> Warning message:
> In as.POSIXlt.POSIXct(Sys.time()) :
>  unknown timezone 'zone/tz/2017c.1.0/zoneinfo/America/Los_Angeles'
> There is nothing odd about the date/time settings on the computer.
> I then tried:
>> Sys.timezone()
> [1] NA
> Previously, there was not a problem with timezones.
> Can I override this?
> Any thoughts?
> Dennis
> Dennis Fisher MD
> P < (The "P Less Than" Company)
> Phone / Fax: 1-866-PLessThan (1-866-753-7784)
> www.PLessThan.com
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