ISO-8601 is designed to be sortable lexicographically, so the same benefit stays there when using dumb tools. Again, no benefit to not using it, other than you

ISO-8601 is designed to be sortable lexicographically, so the same benefit stays there when using dumb tools. Again, no benefit to not using it, other than you are scared of strings. If you are handling JSON from a web API, you are already dealing in strings.