I have a worksheet in which a transaction date is entered into cells
in column A. I need to validate that date when it is entered to
insure it is no earlier than Today() and no greater than Today()+30.
The worksheet is perpetual so data validation at the cell level won't
work. How can I validate the date at a macro level so that the cell
value doesn't become invalid 31 days in the future?

TIA

BrianG

Why do you say data validation at the cell level won't work? The
following does for me.

Allow: Date
Data: between
Start date: =TODAY()
End date: =TODAY()+30

Hth,
Merjet

The worksheet is perpetual so I assumed that dates entered this month
would become invalid next month. Now that I think about it, the
validation only occurs at the time of entry. Would this mean that
cell level validation would only become a problem if someone went back
to an old date and tried to edit it to a value that was outside the
validation range?

Would this mean that cell level validation would only become a
problem if someone went back to an old date and tried to edit it
to a value that was outside the validation range?

Yes.

Merjet