Standard CSI dataloggers manufactured since 1985 will output the correct year as a four-digit number in the data file. However, depending upon the datalogger model and the version of software being used, some adjustments may need to be made to hardware or software clock settings. These are easily made. When the year changes from 1999 to 2000, correct your PC's date then download it to the datalogger. Alternatively, correct *5 directly using the keyboard display.