Contracts and other similar types of financial instruments existed by this time there must be some way they handled it because something that said that it happened on a date that never occurred - sounds like what lawyers live for.

I’ll draft a Dubia so that when future popes change the calendar they will include a representative code sample and details about how we handle this.

(It’s important to remember that the pope and friends were operating much more like an international standards body than a religious leader when doing things like this.)

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wongarsu an hour ago | parent [-]

If a contract dated to the 4th October 1582 specifies you have 15 days to make payment, you would indeed need to know where that contract was signed to determine on what day that deadline expired.

And if there is a contract dated to the 6th October 1582, that does raise questions about its legitimacy (though in general misdating a contract does not void it, it would merely be one point of evidence in your argument that it's a forgery, just like using a particular font in a modern printed contract)

	▲	bombcar 2 minutes ago \| parent [-]
		I was thinking of contracts that say "payment is due on 6 October" from before they knew the date of the change. It's one of those "well technically" things programmers love to obsess over and the judge just says "everyone knows what was meant, stop being an idiot."