bug#66502: 30.0.50; [PATCH; DOC] time-to-days and days-to-time use different epochs

[Bob Rogers]

   From: Richard Stallman <rms@gnu.org>
   Date: Sun, 15 Oct 2023 22:02:57 -0400

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     > Oops; I didn't do that, because I thought doc patches didn't need a
     > ChangeLog message.  In hindsight, they need at least a commit message,
     > so that was pretty silly.

   the commit message should list what entities you changed, added or
   deleted: that is, the doc strings of which functions or variables etc.
   And, in a general sense, what the change was about.

   Please look at doc string change logs in some of the principal files.

Thank you, Richard; I realize what I should have done, and how I should
have done it, I just spaced out in this instance.

                                        -- Bob