[BUG] incorrect result with C-c ! to correct (complete) a date [9.7-pre (release_9.6.1-306-ga645a6 @ /home/d/src/git-org-mode/lisp/)]

[Daniel Ortmann <dortmann31415@pobox.com>]

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Remember to cover the basics, that is, what you expected to happen and
what in fact did happen. You don't know how to make a good report? See

https://orgmode.org/manual/Feedback.html#Feedback

Your bug report will be posted to the Org mailing list.
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* correct date information
Starting with this manually-typed birthday date:
[1960-10-16]
Use the arrows to move to the text.
Now press C-c ! and then ENTER

I expected this result, i.e. I expected the day of the week to be added:
[1960-10-16 Sun]

But the following incorrect result occurs:
[1970-10-16 Fri]



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Content-Type: text/plain
Content-Disposition: attachment; filename=date-edit-oops.org
Content-Description: date edit oops org file


* correct date information
Starting with this manually-typed birthday date:
[1960-10-16]
Use the arrows to move to the text.
Now press C-c ! and then ENTER

I expected this result, i.e. I expected the day of the week to be added:
[1960-10-16 Sun]

But the following incorrect result occurs:
[1970-10-16 Fri]

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Content-Type: text/plain



Emacs : GNU Emacs 30.0.50 (build 50, x86_64-pc-linux-gnu, GTK+ Version 
3.24.34, cairo version 1.16.0)
of 2023-03-19
Package: Org mode version 9.7-pre (release_9.6.1-306-ga645a6 @ 
/home/d/src/git-org-mode/lisp/)
-- 
Daniel Ortmann <dortmann31415@gmail.com> 612-518-3147 m
key: C9E170E2, fingerprint = 81BB 6CAF F1EC F6C7 690C F4E9 66D7 7AFD 
C9E1 70E2

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[-- Attachment #2: date-edit-oops.org --]
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* correct date information
Starting with this manually-typed birthday date:
[1960-10-16]
Use the arrows to move to the text.
Now press C-c ! and then ENTER

I expected this result, i.e. I expected the day of the week to be added:
[1960-10-16 Sun]

But the following incorrect result occurs:
[1970-10-16 Fri]