Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: Charles Packer <mailbox@cpacker.org>
Newsgroups: rec.arts.sf.written
Subject: Re: OT: ChatGPT fails a calendar computation
Date: Sun, 23 Mar 2025 07:57:52 -0000 (UTC)
Organization: A noiseless patient Spider
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On Sun, 23 Mar 2025 01:59:11 -0000 (UTC), The Doctor wrote:

> In article <pan$59bae$5c77e9f3$f94b8dd6$974d543e@cpacker.org>,
> Charles Packer  <mailbox@cpacker.org> wrote:
>>This is hard to believe. I asked ChatGPT "What is the Gregorian date of
>>Orthodox Easter in 2025?" and it replied "...April 27, 2025. Even though
>>the Orthodox Church calculates Easter based on the Julian calendar, the
>>corresponding date in the Gregorian calendar (used in most of the world
>>today) is April 27."
>>But I asked Google Search the same question and it replied "In 2025,
>>Orthodox Easter, also known as Pascha, will be celebrated on Sunday,
>>April 20th, according to the Gregorian calendar." Everything else
>>returned in the Google search confirms that latter answer. It looks like
>>ChatGPT really blew this one.
> 
> Look like LLM is failing!

Further investigation shows that the bot simply can't compute
the dates in the future. Here is a link to my original
queries:

https://chatgpt.com/c/67ded1c2-4198-8013-a16b-d1e82557f868

Initially I wanted to know how often the two Easters and
Passover coincide. It volunteered that in 2011 and 2034 they do,
but didn't mention this year, in which they do coincide.
So I went on to compare ChatGPT with Google searches, and
discover that although the years of coincidence
were correct, the correct Gregorian dates for 2034 are
April 9 for the Easters and April 3-11 for Passover.