From Xojo Documentation
| This item was deprecated in version 2019r2.
Please use Date.FormatStyles as a replacement.
Reports the date in the user's abbreviated date format as a String based on the user's locale and formatting even if the user’s locale is a Unicode-only locale.
Changing the user’s system settings for this format will change the format that AbbreviatedDate uses. On Mac, the AbbreviatedDate property is controlled by the Medium format setting. On Windows, it is an abbreviated version of the Long Date format.
The following code displays the current date in the AbbreviatedDate format.