[R-sig-Debian] Timezone conversion on Ubuntu 20.04

[David Winsemius]

On 4/24/20 4:02 PM, Jeroen Ooms wrote:
> Hi all,
>
> I am testing R 4.0 and ran into an issue with timezones on Ubuntu
> Focal: converting a timestamp to another timezone results in NA:
>
>    as.POSIXct(as.POSIXlt(Sys.time(), tz = "CET"), tz = "EST")
>
> This only happens on Ubuntu Focal, it seems to work fine on Ubuntu
> Bionic. I am the standard ubuntu docker image icw/ r-base from Dirk's
> ppa:edd/r-4.0 on both systems.
>
> Am I missing a system dependency for tzone data?


I don't really know but I do know that "EST" is often not a specific 
valid value. It is used by both the USA and Australia. More valid 
designation would probably be "America/New_York"

The vector of valid names is returned by:

OlsonNames(tzdir = NULL)

-- 

David.

>
> Jeroen
>
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