Dates are very healthy diet. Date contains sugar, protein, fat, vitamin and mineral. So, it is complete package of healthy foods. But date can help you gain weight incase you are very skinny. Make a paste with cucumber and eat it with dates. It will significantly increase your weight and make you healthy and good looking. 100 gm date has 300 calories. So, 1 kg date has 3000 calories which is sufficient for a adult person for one day.