Hi Cristián,
We are aware of many of the issues with date formatting in CODAP. We will address them when we can, but I can’t say how soon this will be. I apologize for this.
We do support the international standard date format for date input (ISO 8601, https://en.wikipedia.org/wiki/ISO_8601), but unfortunately the output in the case table will be formatted for the en-US locale.
A question: there is a similar issue with decimal separators. CODAP expects periods as decimal separators, many countries use commas. Is that an issue for your use of CODAP?
Jonathan