x <- ymd("2012-03-26")
tz(x)
tz(x) <- "GMT"
x
## Not run:
# tz(x) <- "America/New_York"
# x
# tz(x) <- "America/Chicago"
# x
# tz(x) <- "America/Los_Angeles"
# x
# tz(x) <- "Pacific/Honolulu"
# x
# tz(x) <- "Pacific/Auckland"
# x
# tz(x) <- "Europe/London"
# x
# tz(x) <- "Europe/Berlin"
# x
# ## End(Not run)
Sys.setenv(TZ = "GMT")
now()
tz(now())
Sys.unsetenv("TZ")
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