Windows XP, R-devel (2005-08-31 r35465)
> tm <- ISOdate(2005, 08, 29, hour = 12, tz = "EST5EDT")
> tm
[1] "2005-08-29 12:00:00 EDT"
> tm + 0
[1] "2005-08-29 12:00:00 EDT"
> tm + 3600
[1] "2005-08-29 13:00:00 EDT"
> tm + c(0,1) * 3600
[1] "2005-08-29 12:00:00 EDT" "2005-08-29 13:00:00 EDT"
(R 2.1.
Neither of these have reached me on R-devel (and only PR#8103 is on the
archive), and they seem to be the same error although neither mentions the
other. That's 'odd', to quote one of them.
"EDT" is not a valid POSIX timezone (but, say, EST5EDT is). R's docs are
quite clear that what happens
