[R] Timezone problem with 3.4.2

[Dennis Fisher]

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)
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