ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.CIM Namespace / CIMTopoNorthArrow Class / DateInterval Property

DateInterval Property
Gets or sets a value indicating the date interval used to calculate declination. The default value is 5 which is based on the interval used by the World Magnetic Model. A value of zero indicates the current date should be used.
Syntax
public int DateInterval {get; set;}
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 3.0 or higher.
See Also