Date ==== The ``Date`` data type is used to store dates in `ISO 8601 `_ format, which includes the year, month, day, and time with `UTC `_ time zone. This data type is particularly useful for storing information about events that occur on specific dates or for tracking the age of entities. Since dates are stored with `UTC `_ time zone, the data can be consistently interpreted across different time zones. C# Type ``System.DateTime`` Uniqueness May NOT be checked for uniqueness. Format ``yyyy-MM-ddTHH:mm:ss.fffZ`` Example ------- .. code-block:: js "2017-12-27T00:00:00.000Z" // it is better not to store dates before this mark for compatibility reasons "1970-01-01T00:00:00.000Z"