However, the date in your picture is basically of no edible value.

The turning part in the picture is pulp, which is delicious, especially for drunken people, which has obvious sobering effect. It can also make wine itself, "Guazao wine". It has high nutritional and medicinal value. There is no seed core in the pulp of Calligonum, and the "small ball" outside is the seed.

Supplementary note: Calligonum is not a wild fruit, but is planted by people. Like jujube trees and peaches and plums.