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<sect2 id="calc-dayduration">
<title>Day Duration module</title>
<indexterm><primary>Tools</primary>
<secondary>Astrocalculator</secondary>
<tertiary>Day Duration module</tertiary>
</indexterm>
<screenshot>
<screeninfo>The Day Duration calculator module </screeninfo>
<mediaobject>
<imageobject>
<imagedata fileref="calc-daylength.png" format="PNG"/>
</imageobject>
<textobject>
<phrase>Day Duration</phrase>
</textobject>
</mediaobject>
</screenshot>
<para>This module computes the length of day as well as sunrise, sun-transit (noon), and sunset times for any calendar date, for any location on Earth. First fill in the desired geographic coordinates and date, then press the <guibutton>Compute</guibutton> button. </para>
</sect2>
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