Hi Sammie,

To change the format of the date in the header from 1/15/2010 to January 15, 2010, you can follow these steps:

1. Double-click on the header to enter the header editing mode.
2. Click on the "Design" tab in the ribbon.
3. Click on the "Header/Footer Elements" dropdown menu.
4. Select "Date" from the list.
5. Click on the "More Formats" button in the "Header/Footer Elements" dropdown menu.
6. Select "Custom" from the list.
7. In the "Type" field, enter "MMMM d, yyyy" (without the quotes).
8. Click on the "OK" button to close the "Format Cells" dialog box.
9. Click on the "OK" button to close the "Header/Footer Elements" dropdown menu.

Now the date in the header should be displayed in the format of "January 15, 2010".

Alternatively, if you want to format the date as 15-Jan-2010, you can follow these steps:

1. Double-click on the header to enter the header editing mode.
2. Click on the "Design" tab in the ribbon.
3. Click on the "Header/Footer Elements" dropdown menu.
4. Select "Date" from the list.
5. Click on the "More Formats" button in the "Header/Footer Elements" dropdown menu.
6. Select "Custom" from the list.
7. In the "Type" field, enter "dd-mmm-yyyy" (without the quotes).
8. Click on the "OK" button to close the "Format Cells" dialog box.
9. Click on the "OK" button to close the "Header/Footer Elements" dropdown menu.

Now the date in the header should be displayed in the format of "15-Jan-2010".