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From: Douglas McIlroy <douglas.mcilroy@dartmouth.edu>
Date: Fri, 9 Sep 2022 08:06:33 -0400
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Subject: [TUHS] Re: Happy birthday, Unix timestamp!
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> Well, you can imagine what happened when the leading digit changed
> from an ASCII "9" to an ASCII "1". Oops.

I first saw a time-overflow bug more than 60 years ago. Accounting
went haywire in the Bell Labs' comp center on day 256 of the year,
when the encoded output of a new time clock reached the sign bit.

Doug