Age calculation is wrong with international date setting
You can enter birth dates manually or use the drop-down calendar to select the month/day/year for the client. Your computer must be set to a date setting that allows for a Regional Date setting with the Short Date set to MM/dd/yyyy or to M/d/yyyy.
United States date format:
Be certain your computer's Regional Settings Properties are set to English (United States). The Short Date style for this setting allows for using a 4-digit year and you can choose from M/d/yyyy or Mm/dd/yyyy. Check your available settings for the one that allows a 4-digit year,
International date format:
Your computer must be set to a date setting that allows for a Regional Date setting where the Short Date can be set to MM/dd/yyyy or to M/d/yyyy. Some country settings will only recognize a Short Date setting with a 2-digit year. The 2-digit year 1923, for example, defaults to 01 (1901) and CVLT-II will not calculate the age correctly. You must choose a date setting that allows for a 4-digit year. Check your available settings for the one that allows a 4-digit year,
Check your system settings to ensure you are using standard U.S. date formats: