Sorry if this is in the wrong place...

No idea if this is even possible, but is there a way I can just save an Excel workbook without opening - in order to save as current date/time?

I already have multiple Macros that Open files, refresh reports, save, put in a given location etc etc.
But occasionally I want to send a report to a customer that may have been created a few days ago (and I don't want them to know that it's been ready for a few days). I usually just open it, and save and close.

it would be really useful if I could somehow just save it without opening.

Any ideas if this is possible?
Thanks