That military style uses little endian so it belongs in the sane formats category.
However, with ISO you're likely referring to RFC3339. The full ISO8601 standard allows insane date representations you're not going to see anywhere but the documentation that explains them.
The only problem is that it puts the most important information last and the least important first (going by "what do I most likely need to see and cannot infer from context", ie I likely already know the year and possibly the month).
