feat: 7.9 updates

docs/dcc-dates.md

@@ -39,6 +39,14 @@ run;
 
 !!! note
     Data Controller does not support decimals when EDITING.  For datetimes, this means that values must be rounded to 1 second (milliseconds are not supported).
+
+In the LOAD screen these dates display as **ISO 8601** (`YYYY-MM-DD`, `HH:mm:ss`, `YYYY-MM-DDTHH:mm:ss`) regardless of the user's locale.  This guarantees:
+
+- Consistent CSV / Excel exports across geographies
+- Predictable copy / paste between cells and into external tools
+- No more `1/2/2026` vs `2/1/2026` ambiguity at edit time
+
+If you need a locale-specific *display* (eg `DD/MM/YYYY`) on a per-column basis, use the new [`NUMBER_FORMAT`](/dcc-validations/) rule with an `Intl.DateTimeFormat`-compatible JSON value.
     
 If you have other dates / datetimes / times you would like us to support, do [get in touch](https://datacontroller.io/contact)!