They will last for 4-5 days in an airtight container (no need to keep in the fridge once set)These really need soft medjool dates. If your dates are really hard, try soaking in boiling water for 20 mins then draining fully. *This post contains affiliate links. I may receive a small commission when you purchase through these links (at no extra cost to you). I only endorse products that I personally use or have tested.