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      <base href="https://bugs.documentfoundation.org/">
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_UNCONFIRMED "
   title="UNCONFIRMED - [FILESAVE]: changes format of date in cell from DD.MM.YY to MM.DD.YY with save file to .XLSX"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=113889">113889</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[FILESAVE]: changes format of date in cell from DD.MM.YY to MM.DD.YY with save file to .XLSX
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>LibreOffice
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>5.4.0.0.alpha0+
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>UNCONFIRMED
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Calc
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>libreoffice-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>79045_79045@mail.ru
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Description:
Locale is RU!
if you save file to format XLSX and open it in MSO Excel, then in Excel format
of date in cell will be change from DD.MM.YY to MM.DD.YY. But if you open it
XLSX in LibreOffice, then format of date will be OK - DD.MM.YY

Steps to Reproduce:
1. Create a new file in Calc
2. Enter into any cell 23.10.2017 (will be apply format DD.MM.YY)
3. Save file as .XLSX
4. Open file in MS Excel (we tried 2007, 2016)
5. See to format of our cell with date, it changed to MM.DD.YY

Actual Results:  
format of date changed from DD.MM.YY to MM.DD.YY if you open file in the MS
Excel

Expected Results:
format of date didn't change if you open file in the MS Excel


Reproducible: Always


User Profile Reset: No



Additional Info:
it's regression 

i bibisected this bug using bibisect-win32-5.4

first bad commit:
source sha:51478cefaa4e265b42e3f67eda0a64767ff3efba

<a href="https://cgit.freedesktop.org/libreoffice/core/commit/?id=51478cefaa4e265b42e3f67eda0a64767ff3efba">https://cgit.freedesktop.org/libreoffice/core/commit/?id=51478cefaa4e265b42e3f67eda0a64767ff3efba</a>

author Eike Rathke <<a href="mailto:erack@redhat.com">erack@redhat.com</a>> 2017-04-18 14:57:00 (GMT)
committer Eike Rathke <<a href="mailto:erack@redhat.com">erack@redhat.com</a>> 2017-04-18 15:01:27 (GMT)
commit 51478cefaa4e265b42e3f67eda0a64767ff3efba


User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:57.0) Gecko/20100101
Firefox/57.0</pre>
        </div>
      </p>


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