Hey sorry for my typing. I have actually used the same format with % that is > dd<-c("21/01 11:11:11") > strptime(dd,"%d/%m H:M:S") [1] NA it is giving NA. -- View this message in context: http://r.789695.n4.nabble.com/reading-as-date-tp4708434p4708441.html Sent from the R help mailing list archive at Nabble.com.