numToPOSIXct <- function(v) { now <- Sys.time() Epoch <- now - as.numeric(now) Epoch + v } Try this - where v is your numeric version of date -- View this message in context: http://n4.nabble.com/Numeric-to-Date-tp1588108p1588149.html Sent from the R help mailing list archive at Nabble.com.