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<tr align='center'><th>Year + 1792</th><th>e</th><th>f</th><th>g</th><th>h</th></tr>
<tr align='center'><td>Ventôse</td><td>-12 Mar</td>
<td>-11 Mar</td>
<td>-10 Mar</td>
<td>-9 Mar</td>
</tr>
<tr align='center'><td>Germinal</td><td>+18 Mar<br />-13 Apr</td>
<td>+19 Mar<br />-12 Apr</td>
<td>+20 Mar<br />-11 Apr</td>
<td>+21 Mar<br />-10 Apr</td>
</tr>
<tr align='center'><td>Floréal</td><td>+17 Apr<br />-13 May</td>
<td>+18 Apr<br />-12 May</td>
<td>+19 Apr<br />-11 May</td>
<td>+20 Apr<br />-10 May</td>
</tr>
<tr align='center'><td>Prairial</td><td>+17 May<br />-14 Jun</td>
<td>+18 May<br />-13 Jun</td>
<td>+19 May<br />-12 Jun</td>
<td>+20 May<br />-11 Jun</td>
</tr>
<tr align='center'><td>Messidor</td><td>+16 Jun<br />-14 Jul</td>
<td>+17 Jun<br />-13 Jul</td>
<td>+18 Jun<br />-12 Jul</td>
<td>+19 Jun<br />-11 Jul</td>
</tr>
<tr align='center'><td>Thermidor</td><td>+16 Jul<br />-15 Aug</td>
<td>+17 Jul<br />-14 Aug</td>
<td>+18 Jul<br />-13 Aug</td>
<td>+19 Jul<br />-12 Aug</td>
</tr>
<tr align='center'><td>Fructidor</td><td>+15 Aug<br />-16 Sep</td>
<td>+16 Aug<br />-15 Sep</td>
<td>+17 Aug<br />-14 Sep</td>
<td>+18 Aug<br />-13 Sep</td>
</tr>
<tr align='center'><td>Sans-Culottides<br />Additional Days</td><td>+14 Sep</td>
<td>+15 Sep</td>
<td>+16 Sep</td>
<td>+17 Sep</td>
</tr>
</table>
<h3>How to convert 18 Brumaire VIII</h3>
<p>Look at the first table. The French Revolutionary year
<strong>8</strong>
belongs to the interval
<em>1&nbsp;-&nbsp;8</em>
and its last two digits are
<em>08</em>.
The cell in the corresponding
line and column contains the two letters
<em>ch</em>.
<p>Look at the next two tables. The month
<strong>Brumaire</strong>
appears in the
<em>Beginning of Year</em>
table. Of the two letters
<em>ch</em>,
the letter
<em>c</em>
appears in the same table. The corresponding cell contains two formulas:
<em>+22 Oct -9 Nov</em>.
Choose the one that will convert the day number
<strong>18</strong>
into a number in the proper range for the Gregorian month. That is, up to and including
<strong>9 Brumaire</strong>,
use the first formula
<em>+22 Oct</em>,
and later use the second formula
<em>-9 Nov</em>.
Since the French Revolutionary day number is
<strong>18</strong>,
you use <em>-9 Nov</em>. Using the year formula next to the column headers, you get
<strong>9 November 1799</strong>.

<h3>Special cases</h3>
<p>For
<strong>Additional Days</strong>,
there is only one formula, which is much simpler.
<p>For
<strong>Nivôse</strong>,
the cell is split in two, because there are two formulas for the year,
<em>Year&nbsp;+&nbsp;1791</em>
and
<em>Year&nbsp;+&nbsp;1792</em>.
<p><strong>Ventôse</strong>
is in both tables. For
<strong>Ventôse 8</strong>,
in column
<em>c</em>
you obtain the
<em>+19 Feb</em>
formula, and in column
<em>h</em>
you obtain the
<em>-9 Mar</em>
formula. Except for that, everything else is the same. That is, up to and including
<strong>9 Ventôse</strong>,
use the first formula
<em>+19 Feb</em>,
and later use the second formula
<em>-9 Mar</em>.
For example, if you want to convert
<strong>18 Ventôse VIII</strong>,
since the French Revolutionary day number is
<strong>18</strong>,
you use <em>-9 Mar</em>, and you get
<strong>9 March 1800</strong>.
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