DATE--Notes Adjusting for days in a month MS-DOS is programmed to change months and years correctly, whether the month has 28, 29, 30, or 31 days. Using the DATE command in your AUTOEXEC.BAT file To prompt users for the date every time the computer is restarted, include the DATE command in your AUTOEXEC.BAT file. Changing the date format To display the date in other format besides mm-dd-yy, add the COUNTRY command to your CONFIG.SYS file. You can change the date format to the European standard format (dd-mm-yy) or to the Scientific International (Metric) format (yy-mm-dd).