Use this to edit the list entries on the Date Format tab of the Tools | Options menu.
List entries
Displays the current list entries. Select the list item that you want to change, and change the text in the List item field. You can copy the list entries to the clipboard by clicking anywhere on the list with the right mouse button and selecting Copy from the pop-up menu.
List item
Enter the name of the list entry. Click Apply to change the currently selected item within the list.
Apply
Click this button to change the currently selected list item with the text currently entered within the List item field.