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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 - TIme formatting/precision unreliable"
   href="https://bugs.documentfoundation.org/show_bug.cgi?id=123924">123924</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>TIme formatting/precision unreliable
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>6.2.0.3 release
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (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>schopdiedwaas@gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Description:
When I used Calc to add up logged hours, I noticed some inaccuracies in the way
LibreOffice formats and adds time values.

Steps to Reproduce:
- Format any field as a time value with format '[UU]:MM'
- Enter the value '01:55' or '2305:11' in the field (other values may behave
the same).

Actual Results:
01:55 will be displayed as 01:54 in the spreadsheet, but the input line
correctly shows 01:55:00.
2305:11 will be displayed as 2305:10, and the input line shows 2305:10:59.

When using these values in formulas later on, I get some unexpected results as
well. For example adding 26:07 and 1763:35, with the former being the sum of
01:55 and some other values, results in 1789:41.

Expected Results:
All time values should be displayed and calculated as entered.


Reproducible: Always


User Profile Reset: Yes


OpenGL enabled: Yes

Additional Info:
Version: 6.2.0.3
Build ID: 6.2.0-3
CPU threads: 8; OS: Linux 5.0; UI render: default; VCL: gtk3; 
Locale: nl-NL (en_US.UTF-8); UI-Language: en-US
Calc: threaded</pre>
        </div>
      </p>


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