nail down (someone or something)
to make certain or sure of something
I am trying to nail down the exact time that the meeting will begin.
Benefits of Dates
Proteins and fats
Dates excel all other fruits in the proportion of proteins; it contains 2% of proteins by weight and 23 % of harmless vegetable fats totally devoid of cholesterol. date fruits are both food and medicine. There is energy, protection, and cure in it. Next to breast milk, it is the first food that enters a babys stomach.