a character vector specifying which time zone you would like
the current time in. tzone defaults to your computer's system timezone.
You can retrieve the current time in the Universal Coordinated Time (UTC)
with now("UTC").
# NOT RUN {now()
now("GMT")
now("")
now() == now() # would be TRUE if computer processed both at the same instantnow() < now() # TRUEnow() > now() # FALSE# }