You can get the foxpro date, not purchase date, from ?version(1).
Probably you may tell when it was installed analyzing dates of the VFP directories on the local PC

>I have a client who is trying to find out when they purchased VFP 6.0. So far they haven't found it in their records. Is there a way to tell a date from product ID or product version?
>
>Thanks,
>Allen