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: Checking for Time Input.

Checking for Time Input

by Allen Wyatt
(last updated March 21, 2015)

Excel provides a number of functions that return True or False depending on the content of a cell. For instance, ISBLANK returns True if a cell is empty, ISERR returns True if a cell contains an error value, and ISTEXT returns True if a cell contains text. You may wonder if it is possible to determine if a cell contains a time.

The short answer is no, you cannot—Excel contains no function to indicate if a cell contains a time. The reason is quite simple: Times and dates in Excel are technically nothing but numbers. A date is any number in the range 1 to 2958465, which represent the dates of 1/1/1900 through 12/31/9999. If you add a decimal portion to the number, then that represents a time (0 is midnight, 0.25 is 6:00 am, 0.5 is noon, etc.).

Knowing the range of values that can be used for dates and times, along with the fact that a cell containing a time should be formatted properly to display a time, you can create a formula that will indicate if a cell contains a time:

=IF(AND(CELL("format",B2)>="D6",CELL("format",B2)<="D9"),
"Time Format","Not Time Format")

This formula checks the formatting applied to cell B2. If the formatting is one of the commonly used formats for times, then it returns the text "Time Format." If a different formatting is used, then the formula returns "Not Time Format."

A different approach is to check whether the value in cell B2 is a valid time value. You can do that by using a formula such as the following:

=IF(TIMEVALUE(TEXT(B2,"hh:mm:ss"))=B2, "Time Entry", "Not a Time Entry")

The function works fine as long as cell B2 contains only a time. If the cell contains both a date and time, then the function always returns "Not a Time Entry."

To get the best of both worlds—checking formats and the value in the cell—consider making a user-defined function in VBA. The reason is simple: VBA includes the IsDate function which not only looks at the current range of the number, but also checks to see that the cell is formatted as a date. The following macro provides an example as to how you could create such a function:

Function IsTime(rng As Range) As Boolean
    Dim sValue As String
    sValue = rng.Cells(1).Text
    On Error Resume Next
    IsTime = IsDate(TimeValue(sValue))
    On Error GoTo 0
End Function

To use the function, use the following formula in a cell:

=IsTime(B2)

The function reads how the value is displayed (using the text property of the cell object) and then tries to convert it with the TIMEVALUE function. If that is a date (determined by the IsDate function) then the display is a valid time. If it is not a date, VBA generates an error, which the code is programmed to ignore.

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (3292) 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: Checking for Time Input.

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

Using the Status Bar

When developing a macro, you may want to display on the status bar what the macro is doing. Here's how to use this important ...

Discover More

Underlining a Number in a Numbered List

Word allows you to format the numbers that appear in a numbered list, but what if you want to underline only a single item's ...

Discover More

Converting PDF to Excel

Reports and other formal documents are often distributed in PDF format so that they can be read and printed on a variety of ...

Discover More

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!

MORE EXCELTIPS (MENU)

Displaying a Result as Minutes and Seconds

When you use a formula to come up with a result that you want displayed as a time, it can be tricky figuring out how to get ...

Discover More

Converting Numeric Values to Times

If you have a bunch of times entered into cells without the colon between the hours and minutes, chances are good that Excel ...

Discover More

Dealing with Large Numbers of Seconds

When adding values to a time to calculate a new time, you may naturally choose to use the TIME function. This can cause some ...

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 for this tip:

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.

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.

Links and Sharing
Share