{"id":520,"date":"2018-06-28T11:42:03","date_gmt":"2018-06-28T11:42:03","guid":{"rendered":"http:\/\/officetuts.net\/excel\/?p=520"},"modified":"2024-03-30T11:00:57","modified_gmt":"2024-03-30T11:00:57","slug":"mathematical-operations-on-date-and-time","status":"publish","type":"post","link":"https:\/\/officetuts.net\/excel\/training\/mathematical-operations-on-date-and-time\/","title":{"rendered":"Mathematical Operations on Date and Time in Excel"},"content":{"rendered":"\n<p>You can perform such arithmetic operations as addition or subtraction not only on numbers&nbsp;but also on dates. In this lesson, I will show you a few examples of how you can do it.<\/p>\n\n\n\n<h2 class=\"format wp-block-heading\">Calculating the number of days between two dates<\/h2>\n\n\n\n<h3 class=\"format wp-block-heading\">Example 1:<\/h3>\n\n\n\n<p>If you want to perform addition or subtraction on dates, first, you need to save them in separate cells. Let it be cell&nbsp;<strong>A1<\/strong>&nbsp;and cell&nbsp;<strong>A2.<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-preformatted lang:vb decode:true\">A1 = January 10, 2014 15:15:00<\/pre>\n\n\n\n<pre class=\"wp-block-preformatted lang:vb decode:true\">A2 = February 12, 2014<\/pre>\n\n\n\n<p>When a date includes time other than midnight (24:00:00 is the default time) then the number of days that are returned will be reduced by one. The following examples show ways to ignore time and use only the date part.<\/p>\n\n\n\n<h3 class=\"format wp-block-heading\">Example 2:<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted lang:vb decode:true\">= DAYS(A2, A1)<\/pre>\n\n\n\n<p>returns&nbsp;<strong>33.<\/strong><\/p>\n\n\n\n<p>In this example, the<strong>&nbsp;DAYS<\/strong>&nbsp;function returns the number of days between two dates.<\/p>\n\n\n\n<h3 class=\"format wp-block-heading\">Example 3:<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted lang:vb decode:true\">= INT(A2) - INT(A1)<\/pre>\n\n\n\n<p>returns&nbsp;<strong>33.<\/strong><\/p>\n\n\n\n<p>The date and time were <a href=\"https:\/\/officetuts.net\/excel\/formulas\/round-to-nearest-value\/\">rounded to the nearest integer<\/a> (in this case, it means getting rid of the time part, so only a day will be remembered. The time will be set to the default value, which is 24:00:00).<\/p>\n\n\n\n<h2 class=\"format wp-block-heading\">Adding and subtracting days<\/h2>\n\n\n\n<p>Let&#8217;s use the example from the previous exercise.<\/p>\n\n\n\n<h3 class=\"format wp-block-heading\">Example 4:<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted lang:vb decode:true\">A1 = January 10, 2014<\/pre>\n\n\n\n<p>If you want to see what date will be 33 days after the date of&nbsp;<strong>January 10, 2014<\/strong>, you can add to that date the number 33.<\/p>\n\n\n\n<p>Look at the following formula:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted lang:vb decode:true\">= A1 + 33<\/pre>\n\n\n\n<p>The result will be&nbsp;<strong>February 12, 2014<\/strong>. You can also check what date was 33 days before the date of&nbsp;<strong>February 12, 2013<\/strong>.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted lang:vb decode:true\">A2 = February 12, 2014<\/pre>\n\n\n\n<pre class=\"wp-block-preformatted lang:vb decode:true\">= A2 - 33<\/pre>\n\n\n\n<p>The result is&nbsp;<strong>January 10, 2014<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>You can perform such arithmetic operations as addition or subtraction not only on numbers&nbsp;but also on dates. In this lesson, I will show&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[190],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Mathematical Operations on Date and Time in Excel<\/title>\n<meta name=\"description\" content=\"Learn to perform arithmetic operations on dates, including finding the number of days between two dates. 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