NFS file's time

[Gaboli Ivan <gaboli ic8wd2 settimo italtel it>]

I have a machine A, with a partition mounted on /mnt/pk, and clock set, 
for example, at 10:30.

I have a linux machine B, with clock set at 10:25.

I've mounted NFS /mnt/pk on /mnt/mp in machine B.

When I create a new file, in /mnt/mp, it has date&time of machine A 
(10:30) rather than B's time (10:25).

Somebody may explain this fact ?

In my experience, in Digital NFS, the official time is the machine time from 
wich the file is created.

Regards, Ivan