You can just use ISO 8601, YYYY-MM-DD, then you can be international standards compliant as well.
And if you are using something else, especially if it’s something like XX-XX-XX, specify what you mean by that!
> NOTE: ISO 8601 defines date and time separated by "T". Applications using this syntax may choose, for the sake of readability, to specify a full-date and full-time separated by (say) a space character.
Starting with the day or the month is Ludacris.