This is missing the biggest difference: ISO 8601 costs 190-450€, whereas RFC 3339 is free.

• We need a new standard that unifies all 14 standards.
• Proceeds to create a new standard
• There are 15 standards.

TIL that, at least according to the linked page, YYYY-MM-DD hh:mm:ss (or %Y-%M-%D %h:%m:%s in strftime format) isn't valid in either system.

ISO8601 apparently disallows spaces altogether, so that space should be a T for it to qualify there; RFC3399 allows the space, but insists there should be a UTC offset of some kind at the end.

Unrelatedly, the page's use of %Z and %z doesn't match with strftime formatting at all, so there's at least one other standards problem lurking here.

This has the “just one more bro” feel to it.