1. Card chart when plotted with Date/Interval column types with Minimum/Maximum aggregation shows the Minimum/Maximum date out of that column.
   
2. Default date format is displayed in ISO format.
   
3. The customization for datetime can be done using the available DateTime formatters in Data Labels.
   
4. These are only displayed when card chart is configured with Minimum or Maximum aggregations of the chart.
   
5. The formatting of date and time is allowed using different Date/Time/Datetime formatting options.
   
6. Custom options for datetime formatting are also allowed using Datetime formats.
   
7. Refer Datetime formatting for more details.