Please Note: This article is written for users of the following Microsoft Excel versions: 97, 2000, 2002, and 2003. If you are using a later version (Excel 2007 or later), this tip may not work for you. For a version of this tip written specifically for later versions of Excel, click here: Calculating the Day of the Year.

Calculating the Day of the Year

Written by Allen Wyatt (last updated September 15, 2018)
This tip applies to Excel 97, 2000, 2002, and 2003


You've probably seen it on calendars before—some include an indication that "Today is the 123 day of the year with 242 remaining." You can easily calculate the day number of a year, as well as how many are remaining. For instance, let's assume you have a date in cell D27. You could use the following formulas to calculate, respectively, what day of the year it is and how many are still left:

=D27-"12/31/2008"
="12/31/2009"-D27

The reason that the first formula uses a date of 12/31/2008 is so the result will show the actual day number. Using these formulas, the result of 1/1/2009 in cell D27 would result in 1, meaning it is the first day of the year. (This is as it should be.)

Of course, once you enter the formulas, you need to format the cells as regular numbers. (Excel will, by default, try to format the cells as dates.) With the two cells selected, follow these steps:

  1. Choose the Cells option from the Format menu. Excel displays the Format Cells dialog box.
  2. Make sure the Number tab is selected. (See Figure 1.)
  3. Figure 1. The Number tab of the Format Cells dialog box.

  4. In the Category list, choose Number.
  5. Make sure the Decimal Places option is set to 0.
  6. Click on OK.

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (2931) applies to Microsoft Excel 97, 2000, 2002, and 2003. You can find a version of this tip for the ribbon interface of Excel (Excel 2007 and later) here: Calculating the Day of the Year.

Author Bio

Allen Wyatt

With more than 50 non-fiction books and numerous magazine articles to his credit, Allen Wyatt is an internationally recognized author. He is president of Sharon Parq Associates, a computer and publishing services company. ...

MORE FROM ALLEN

Inserting Footnotes Using Custom Footnote Marks

Automatic footnotes are easy to insert in Word documents. The default settings are usually fine for most projects. ...

Discover More

Aligning Plus/Minus Symbols

Scientific writing often involves the use of special symbols, such as the plus/minus symbol. If you want to align these ...

Discover More

Links between Two Desktop Workbooks

If you have formulas that reference values in an external workbook and that workbook is closed, Excel may generate ...

Discover More

Excel Smarts for Beginners! Featuring the friendly and trusted For Dummies style, this popular guide shows beginners how to get up and running with Excel while also helping more experienced users get comfortable with the newest features. Check out Excel 2013 For Dummies today!

More ExcelTips (menu)

The Last Business Day

Many businesses need to know when the last business day of the month occurs. This tip discusses several ways you can ...

Discover More

Calculating a Group Retirement Date

Calculating a retirement date can be as simple as doing some date math to see when a person reaches a certain age. ...

Discover More

Deciphering a Coded Date

It is no secret that Excel allows you to work with dates in your worksheets. Getting your information into a format that ...

Discover More
Subscribe

FREE SERVICE: Get tips like this every week in ExcelTips, a free productivity newsletter. Enter your address and click "Subscribe."

View most recent newsletter.

Comments

If you would like to add an image to your comment (not an avatar, but an image to help in making the point of your comment), include the characters [{fig}] (all 7 characters, in the sequence shown) in your comment text. You’ll be prompted to upload your image when you submit the comment. Maximum image size is 6Mpixels. Images larger than 600px wide or 1000px tall will be reduced. Up to three images may be included in a comment. All images are subject to review. Commenting privileges may be curtailed if inappropriate images are posted.

What is 2 + 2?

There are currently no comments for this tip. (Be the first to leave your comment—just use the simple form above!)


This Site

Got a version of Excel that uses the menu interface (Excel 97, Excel 2000, Excel 2002, or Excel 2003)? This site is for you! If you use a later version of Excel, visit our ExcelTips site focusing on the ribbon interface.

Newest Tips
Subscribe

FREE SERVICE: Get tips like this every week in ExcelTips, a free productivity newsletter. Enter your address and click "Subscribe."

(Your e-mail address is not shared with anyone, ever.)

View the most recent newsletter.