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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 - date formula skips a month (same formula hasn't been ok till today)"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=115300">115300</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>date formula skips a month (same formula hasn't been ok till today)
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>5.3.4.2 release
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>Windows (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>mclean8414@gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Description:
I have been using =DATE(YEAR(A1), MONTH(A1)+1, DAY(A1)), which adds one month
to today's date. Has been working the last 6 or 8 months, but now it is
skipping February and shows March! 

Steps to Reproduce:
1. =now()....in A1 And as today being Jan. 29
2.=DATE(YEAR(A1), MONTH(A1)+1, DAY(A1))This will skip a month and show March!
3.=MONTH(A1)This will show December!

Actual Results:  
Above

Expected Results:
above


Reproducible: Always


User Profile Reset: No



Additional Info:
[Information automatically included from LibreOffice]
Locale: en-US
Module: SpreadsheetDocument
[Information guessed from browser]
OS: Windows (All)
OS is 64bit: no


User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101
Firefox/57.0</pre>
        </div>
      </p>


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