Rinse 2 cups pitted dates under cool water to remove any residue.

Combine rinsed dates and 1.5 cups filtered water in a medium saucepan.

Bring mixture to a gentle boil over medium-high heat, stirring occasionally, about 2-3 minutes.

Reduce heat to medium and simmer for 15-18 minutes, stirring every few minutes until dates break down and liquid reduces by about one-quarter.

Remove pan from heat and let the mixture cool for 5-10 minutes until warm but not hot.

Transfer the mixture to a blender and blend on high for 60-90 seconds until completely smooth.

Optionally, strain the syrup through a fine mesh strainer into a bowl, pressing with a spoon to remove any fibers.

Let the syrup cool to room temperature and transfer it to clean glass jars for storage; it will thicken as it cools.