DO YOU HAVE FEET CRAMPS AT NIGHT?

IF YOU HAVE FEET CRAMPS AT  NIGHT OR EARLY IN THE MORNING:

Especially between 3 am and 6 am in the morning?
It is also my problem. 
Scientifically there is no evidence that cramps must occur at this precise time. 
But why do we have these cramps at this time ? 

I'm doing a statistic survey on this problem: 

If you too have cramps that occur suddenly or prepare, between 3 am and 6 in the morning or at any time of day, that spoil your sleep and living, simply put a note in: Comments, at the bottom of the text specifying the hours of your cramps. 

The results can be seen by everyone. 
And perhaps a solution will be found on the net. 

NB: If you have any "MAGICAL" solution to reduce or eliminate foot cramps at night please don't hesitate to write it down also .


Your advice and experience can solve this problem. 
Thank you in advance.