1. In a cell, enter the formula =TODAY()+7.
2. Select the column of dates that you want to filter.
3. Go to the Data tab and click on the Filter button.
4. Click on the drop-down arrow in the column header and select Filter by Color Custom Filter.
5. In the Custom AutoFilter dialog box, select "is less than or equal to" from the first drop-down list.
6. In the second drop-down list, select "Cell Value" and then select the cell that contains the formula =TODAY()+7.
7. Click OK to apply the filter.

This should filter the column of dates to show only those that are less than 7 days from today. Note that the formula in the cell should not have quotes around it, and you should select "Cell Value" in the Custom AutoFilter dialog box to refer to the cell that contains the formula.