Fresh dates will keep at room temperature for about 45 days. When stored in the refrigerator, they're good for up to 6 months. Frozen dates keep for up to a year.
Dried dates can be refrigerated for a year, or frozen for as long as 5 years.
Store dates in an airtight container or resealable plastic bag, and label the bag with the date you bought them.
If the dates develop a dusty exterior over time, it simply means the sugars are making their way to the surface. If you feel the need, wipe off the sugar with a damp paper towel or heat the dates over a very low temperature.