Try this: old.date <- "X01.11.2010" new.date <- format(as.Date(old.date,format="X%d.%m.%Y"),"%d.%b.%y") [1] "01.Nov.10" -- View this message in context: http://r.789695.n4.nabble.com/Transform-date-style-tp4633377p4633381.html Sent from the R help mailing list archive at Nabble.com.