ExcelTips (Ribbon Interface)

Incrementing Months in Dates

Please Note: This article is written for users of the following Microsoft Excel versions: 2007, 2010, and 2013. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here: Incrementing Months in Dates.

Hiren has a series of dates in a worksheet. He would like to increment the month, so that (for instance) August becomes September in the dates. He wonders if there a way this can be done using Find and Replace.

You actually could use Find and Replace to do the changing. For instance, let's assume that the date shown in the cell range is 8/1/13 through 8/31/13. You could do a search for "8/" (without the quote marks) and replace it with "9/" (again, without the quotes).

There are a couple of problems with this approach, however. First, you'll end up making changes that you probably don't want to make. For instance, 8/18/13 is changed to 9/19/13 because there are two instances of 8/ in the original value. Second, when you change 8/31/13 to 9/31/13, Excel treats the converted date as text rather than as a date because 9/31 is not a valid date. In addition, you'll need to modify what you are searching for and replacing with based upon how the date is formatted in the cells.

A better solution is to use a formula to do the incrementing. The function you want to use for this purpose is EDATE, as shown here:

```=EDATE(A1,1)
```

The formula works great at incrementing the month. You need to understand how the function works when the result of incrementing the month results in an invalid date. For instance, if the original date is 8/31/13 and you use the formula, it returns 9/30/13, the last valid day in September.

If you want, instead, to see an error when trying to increment, then the formula can be adjusted to compensate:

```=IF(DAY(EDATE(A1,1))<DAY(A1),NA(),EDATE(A1,1))
```

This formula compares the date of the converted date to the day of the original date, and if they are not the same then it returns an #N/A error.

If you want, instead, to have the invalid date "fall over" to the next month (so that 8/31/13, when incremented, becomes 10/1/13), then you can use a different formula that doesn't rely on EDATE:

```=DATE(YEAR(A1),MONTH(A1)+1,DAY(A1))
```

This formula will, interestingly enough, handle the "end of the year wrap" correctly. Thus, an original date in A1 of 12/1/13 will become 13/1/13 which is translated by Excel as 1/1/14.

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (9265) applies to Microsoft Excel 2007, 2010, and 2013. You can find a version of this tip for the older menu interface of Excel here: Incrementing Months in Dates.

Related Tips:

Professional Development Guidance! Four world-class developers offer start-to-finish guidance for building powerful, robust, and secure applications with Excel. The authors show how to consistently make the right design decisions and make the most of Excel's powerful features. Check out Professional Excel Development today!

 *Name: Email: Notify me about new comments ONLY FOR THIS TIP Notify me about new comments ANYWHERE ON THIS SITE Hide my email address *Text: *What is 5+3 (To prevent automated submissions and spam.)

Stefan    14 Nov 2016, 09:29
This formula is great, works fine for me:
=EDATE(A1,1)

Our Company

Sharon Parq Associates, Inc.

Our Sites

Tips.Net

Beauty and Style

Cars

Cleaning

Cooking

ExcelTips (Excel 97–2003)

ExcelTips (Excel 2007–2016)

Gardening

Health

Home Improvement

Money and Finances

Organizing

Pests and Bugs

Pets and Animals

WindowsTips (Microsoft Windows)

WordTips (Word 97–2003)

WordTips (Word 2007–2016)

Excel Products

Word Products

Our Authors

Author Index

Write for Tips.Net