<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/73162>73162</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [libc++] std::chrono::year_month::operator+=(month) is broken
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            libc++
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          stevem2t
      </td>
    </tr>
</table>

<pre>
    Like #63912, year_month::operator+= (and -= and probably more) do not increment the year.
https://godbolt.org/z/qds1oE7WM

</pre>
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