I would like to officially introduce an RFC with a patch to implement __toString to DateTime. This is a commonly requested feature that goes unanswered mostly because of the inability to agree on a default pattern.
In short, the patch uses the ISO-8601 format as the default pattern. The pattern may be changed via setDefaultPattern and date_default_pattern_set, as explained in the RFC. The link to the RFC and patch are here: https://wiki.php.net/rfc/datetime_tostring. While I know this isn't as interesting as many of the current proposals going on, I'm hoping you can give this RFC a look. - Will
