Thanks for the quick answer. I was hoping I wouldn't have to select a date
range, but oh well.

John S.

"Tom Hutchins" wrote:

Use Data Validation. Select the column with the date format, then select Data
Validation (in XL2007, Data Validation is on the Data ribbon). Set the
validation to allow "Date" between 1/1/1930 and 12/31/9999 (or whatever date
range you want). This will reject any entry Excel can't recognize as a valid
date.

Hope this helps,

Hutch

"DocBrown" wrote:

I have a column set to date format. The cells seem to accept invalid date
formats such as '01/01//2009'. The data is not converted to a date value.
Other date entries are modified. For example if you enter 01/02, Excel will
convert that to 1/1/2009.

What's a method to reject invalid dates such as above or 02/30/2009.