Quick newbie question please: I am trying to turn a dataframe into xts with the function; As.xts But it returns the error; Error in as.POSIXlt.character(x, tz, ...) : character string is not in a standard unambiguous format could someone give me some pointers please the data is coming from a spreadsheet via the excel function rputdataframe, and has 3 columns of dates (excel format) regards glenn [[alternative HTML version deleted]]