Idiots at work

Ed and Malcolm were called to change the wrong date format (only USA) to the more international and wider accepted format (ISO 8601). But when they looked at the date they were confused. What on earth would "51 5" mean? Day 51 of month 5? Or Day 5 of month 51? Both not possible.
Until it dawned on Ed. They were looking from the wrong side!
It was not "51 5" but instead it was "5 15". They tried their best to change it, but to no avail. So they could do nothing, except for presenting us with a bill. Regular handymen. They never heard about the slogan "no cure no pay".