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	<id>https://wiki4men.com/w/index.php?action=history&amp;feed=atom&amp;title=Microsoft_Excel</id>
	<title>Microsoft Excel - Revision history</title>
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	<updated>2026-04-04T09:31:44Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://wiki4men.com/w/index.php?title=Microsoft_Excel&amp;diff=94742&amp;oldid=prev</id>
		<title>Robert Brockway at 04:44, 18 June 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki4men.com/w/index.php?title=Microsoft_Excel&amp;diff=94742&amp;oldid=prev"/>
		<updated>2025-06-18T04:44:25Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left diff-editfont-monospace&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 04:44, 18 June 2025&lt;/td&gt;
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  &lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 6:&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&amp;#160;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&amp;#160;&lt;/td&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;&amp;#160;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{Microsoft}}&lt;/div&gt;&lt;/td&gt;
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&lt;/table&gt;</summary>
		<author><name>Robert Brockway</name></author>
	</entry>
	<entry>
		<id>https://wiki4men.com/w/index.php?title=Microsoft_Excel&amp;diff=94741&amp;oldid=prev</id>
		<title>Robert Brockway at 04:43, 18 June 2025</title>
		<link rel="alternate" type="text/html" href="https://wiki4men.com/w/index.php?title=Microsoft_Excel&amp;diff=94741&amp;oldid=prev"/>
		<updated>2025-06-18T04:43:09Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left diff-editfont-monospace&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 04:43, 18 June 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
  &lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
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&lt;tr&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&amp;#160;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Microsoft Excel]] is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS. It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA). Excel forms part of the Microsoft 365 and Microsoft Office suites of software and has been developed since 1985.&lt;/div&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&amp;#160;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Microsoft Excel]] is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS. It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA). Excel forms part of the Microsoft 365 and Microsoft Office suites of software and has been developed since 1985.&lt;/div&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&amp;#160;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&amp;#160;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;
&lt;/tr&gt;
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  &lt;td class=&quot;diff-marker&quot;&gt;−&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Excel &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;includes&lt;/del&gt; February 29, 1900, incorrectly treating 1900 as a leap year, even though &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;e.g.&lt;/del&gt; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;2100&lt;/del&gt; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;is&lt;/del&gt; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;correctly&lt;/del&gt; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;treated&lt;/del&gt; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;as&lt;/del&gt; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;a&lt;/del&gt; &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;non-&lt;/del&gt;leap &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;year&lt;/del&gt;. Thus, a formula counting dates between (for example) February 1, 1900 and March 1, 1900 will return an incorrect result. The bug originated from Lotus 1-2-3 where it likely originated from the developers carelessly assuming they understood the Gregorian calendar rather than checking the standard.&lt;/div&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;+&lt;/td&gt;
  &lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Excel &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;considers&lt;/ins&gt; February 29, 1900&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt; to be a valid date&lt;/ins&gt;, incorrectly treating 1900 as a leap year, even though &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;the&lt;/ins&gt; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Gregorian&lt;/ins&gt; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;calendar&lt;/ins&gt; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;excludes&lt;/ins&gt; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;years&lt;/ins&gt; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;divisible&lt;/ins&gt; &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;by 100 from being&lt;/ins&gt; leap &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;years unless they are also divisible by 400&lt;/ins&gt;. Thus, a formula counting dates between (for example) February 1, 1900 and March 1, 1900 will return an incorrect result. The bug originated from Lotus 1-2-3 where it likely originated from the developers carelessly assuming they understood the Gregorian calendar rather than checking the standard.&lt;/div&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&amp;#160;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&amp;#160;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&amp;#160;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This legacy has later been carried over into Office Open XML file format.&lt;/div&gt;&lt;/td&gt;
  &lt;td class=&quot;diff-marker&quot;&gt;&amp;#160;&lt;/td&gt;
  &lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This legacy has later been carried over into Office Open XML file format.&lt;/div&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Robert Brockway</name></author>
	</entry>
	<entry>
		<id>https://wiki4men.com/w/index.php?title=Microsoft_Excel&amp;diff=94738&amp;oldid=prev</id>
		<title>Robert Brockway: Partial import from https://en.wikipedia.org/w/index.php?title=Microsoft_Excel&amp;oldid=1296008813</title>
		<link rel="alternate" type="text/html" href="https://wiki4men.com/w/index.php?title=Microsoft_Excel&amp;diff=94738&amp;oldid=prev"/>
		<updated>2025-06-18T04:41:15Z</updated>

		<summary type="html">&lt;p&gt;Partial import from https://en.wikipedia.org/w/index.php?title=Microsoft_Excel&amp;amp;oldid=1296008813&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;[[Microsoft Excel]] is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS. It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA). Excel forms part of the Microsoft 365 and Microsoft Office suites of software and has been developed since 1985.&lt;br /&gt;
&lt;br /&gt;
Excel includes February 29, 1900, incorrectly treating 1900 as a leap year, even though e.g. 2100 is correctly treated as a non-leap year. Thus, a formula counting dates between (for example) February 1, 1900 and March 1, 1900 will return an incorrect result. The bug originated from Lotus 1-2-3 where it likely originated from the developers carelessly assuming they understood the Gregorian calendar rather than checking the standard.&lt;br /&gt;
&lt;br /&gt;
This legacy has later been carried over into Office Open XML file format.&lt;br /&gt;
&lt;br /&gt;
{{Featured}}&lt;br /&gt;
{{Microsoft}}&lt;/div&gt;</summary>
		<author><name>Robert Brockway</name></author>
	</entry>
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