I have heard about diet in which eating before
noon is forbidden. I don't remember the name
of the diet.
If anyone know the name, please let me know.

Sounds like The Warrior Diet.

Thanks for your answer but I don't think it was
The Warrior Diet.
As far as I remember the main rule of the diet
was that one shouldn't eat anything or eat just fruits
(except bananas) till noon only.

Regards
Zofia