Specifies the date and time used by the Date Last Modified and Date Created asking filters to determine whether an object changed. The default baseline date and time is 01/01/1900 12:00:00 AM. If you change the default date to a date later than 01/01/1901, the software performs a full update when you update the drawing. In other words, the software does not perform a full update if you update the month and day, but leave the year set to 1900.