I couldn't get it to run as a VBS script, but that's not my area of expertise.
We have to do some work to get it to run from outside of Excel.

One thing that I noticed is as soon as I typed it in the header advanced, then it became a drop down in the normal header selection form.
Feb 05 was there right under Page # Date and the rest.
If you could find *that* you could change it easier.

I would post it in the VBA forum. RobDog888 prolly has a solution.