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<?xml version="1.0" encoding="UTF-8"?>
<helpdocument version="1.0">
<!--
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<meta>
<topic id="textsbasicshared03030120xhp" indexer="include" status="PUBLISH">
<title id="tit" xml-lang="en-US">DateDiff Function</title>
<filename>/text/sbasic/shared/03030120.xhp</filename>
</topic>
</meta>
<body>
<section id="datediff">
<bookmark xml-lang="en-US" branch="index" id="bm_id6134830">
<bookmark_value>DateDiff function</bookmark_value>
</bookmark>
<paragraph id="par_idN10542" role="heading" level="1" xml-lang="en-US"><link href="text/sbasic/shared/03030120.xhp">DateDiff Function</link></paragraph>
<paragraph id="par_idN10546" role="paragraph" xml-lang="en-US">Returns the number of date intervals between two given date values.</paragraph>
</section>
<paragraph id="par_idN10549" role="heading" level="2" xml-lang="en-US">Syntax:</paragraph>
<bascode>
<paragraph id="par_idN10648" role="bascode" xml-lang="en-US">DateDiff (Add, Date1, Date2 [, Week_start [, Year_start]])</paragraph>
</bascode>
<paragraph id="par_idN1064B" role="heading" level="2" xml-lang="en-US">Return value:</paragraph>
<paragraph id="par_idN1064F" role="paragraph" xml-lang="en-US">A number.</paragraph>
<paragraph id="par_idN10652" role="heading" level="2" xml-lang="en-US">Parameters:</paragraph>
<paragraph id="par_idN10656" role="paragraph" xml-lang="en-US"> <emph>Add</emph> - A string expression from the following table, specifying the date interval.</paragraph>
<embed href="text/sbasic/shared/03030110.xhp#datetable"/>
<paragraph id="par_idN10664" role="paragraph" xml-lang="en-US"> <emph>Date1, Date2</emph> - The two date values to be compared.</paragraph>
<section id="weekyear">
<paragraph id="par_idN1066A" role="paragraph" xml-lang="en-US"> <emph>Week_start</emph> - An optional parameter that specifies the starting day of a week. </paragraph>
<table id="tbl_id8356883">
<tablerow>
<tablecell>
<paragraph id="par_idN1067A" role="tablehead" xml-lang="en-US">Week_start value</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN10680" role="tablehead" xml-lang="en-US">Explanation</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN10687" role="tablecontent" xml-lang="en-US">0</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN1068D" role="tablecontent" xml-lang="en-US">Use system default value</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN10694" role="tablecontent" xml-lang="en-US">1</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN1069A" role="tablecontent" xml-lang="en-US">Sunday (default)</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN106A1" role="tablecontent" xml-lang="en-US">2</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN106A7" role="tablecontent" xml-lang="en-US">Monday</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN106AE" role="tablecontent" xml-lang="en-US">3</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN106B4" role="tablecontent" xml-lang="en-US">Tuesday</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN106BB" role="tablecontent" xml-lang="en-US">4</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN106C1" role="tablecontent" xml-lang="en-US">Wednesday</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN106C8" role="tablecontent" xml-lang="en-US">5</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN106CE" role="tablecontent" xml-lang="en-US">Thursday</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN106D5" role="tablecontent" xml-lang="en-US">6</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN106DB" role="tablecontent" xml-lang="en-US">Friday</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN106E2" role="tablecontent" xml-lang="en-US">7</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN106E8" role="tablecontent" xml-lang="en-US">Saturday</paragraph>
</tablecell>
</tablerow>
</table>
<paragraph id="par_idN106EB" role="paragraph" xml-lang="en-US"> <emph>Year_start</emph> - An optional parameter that specifies the starting week of a year. </paragraph>
<table id="tbl_id1173436">
<tablerow>
<tablecell>
<paragraph id="par_idN106FB" role="tablehead" xml-lang="en-US">Year_start value</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN10701" role="tablehead" xml-lang="en-US">Explanation</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN10708" role="tablecontent" xml-lang="en-US">0</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN1070E" role="tablecontent" xml-lang="en-US">Use system default value</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN10715" role="tablecontent" xml-lang="en-US">1</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN1071B" role="tablecontent" xml-lang="en-US">Week 1 is the week with January, 1st (default)</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN10722" role="tablecontent" xml-lang="en-US">2</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN10728" role="tablecontent" xml-lang="en-US">Week 1 is the first week containing four or more days of that year</paragraph>
</tablecell>
</tablerow>
<tablerow>
<tablecell>
<paragraph id="par_idN1072F" role="tablecontent" xml-lang="en-US">3</paragraph>
</tablecell>
<tablecell>
<paragraph id="par_idN10735" role="tablecontent" xml-lang="en-US">Week 1 is the first week containing only days of the new year</paragraph>
</tablecell>
</tablerow>
</table>
</section>
<paragraph id="par_idN10738" role="heading" level="2" xml-lang="en-US">Example:</paragraph>
<bascode>
<paragraph id="par_idm1341501344" role="bascode" localize="false" xml-lang="en-US">Sub example_datediff</paragraph>
<paragraph id="par_idm1341500112" role="bascode" localize="false" xml-lang="en-US"> MsgBox DateDiff("d", "1/1/2005", "12/31/2005")</paragraph>
<paragraph id="par_idm1341498848" role="bascode" localize="false" xml-lang="en-US">End Sub</paragraph>
</bascode>
</body>
</helpdocument>
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