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In Excel 2010: Working with Dates and Times, Dennis Taylor shares his solutions for optimizing the use of dates and times in Excel 2010. This course explains what's going on behind the scenes when Excel stores dates and times, gives tips for entering dates and times, and shows options for date and time formatting. It also demonstrates the various date and time functions and shows how to calculate with dates and times in a range of scenarios. Exercise files are included with the course.
In this worksheet in Column D, times have been recorded for the time of the sale, time of day. Times in Excel are based on the date system. The unit of measure between dates is 1, but how does time play out here? It's not so obvious. Times as with dates considered values. If we type in a time 5:00, for example, 5 AM, we actually have stored here a value, the same way the dates are values or times. 5 o'clock represents a certain portion of the day. It's 5/24ths.
What if it were 6 AM? We would type 6:00. That's one-fourth of a day. Rarely do we need to see what the value is, but if you happened to click the comma in the Home tab, this is one quick way to get there. You will see that's the actual value being stored, one quarter. Most of the time you are not thinking about this. It does explain how we can subtract times from one another and how we can add values to time entries. So rarely do we actually need to click this button to see what the value is.
Just remember that when you do enter times into a worksheet, or when you are dealing with times, you are dealing with values and they represent a portion of the day. 12 noon is .5, 6 PM would be .75. You will see later different ways to enter the day, but certainly you could enter it this way, and that value there is .75, again a quick look. There we go! Times are portions of days, and that's the way they are treated in Excel as you deal with time math throughout different worksheets.
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