Userform - Insert File's last saved Date

Could anyone advise if there is an easy way of showing the active file "Last Saved Date" on a Userform and have it show automatically when the Userform is opened?

The Scenario is:

I have a "Main" userform screen and I want to have a text line which says, "File last updated on xx/yy/zzzz ". This must show up automatically when the "main" userform is opened.


Any assistance would be appreciated.