The ornamental design for a magneticperpetualcalendar, as shown and described.
FIG. 1 is a front elevational view of a magnetic perpetual calendar showing
my new design, the undisclosed rear being flat and unornamented; and,
FIG. 2 is a right side elevational view thereof, the undisclosed left side
being a mirror image and it being understood that the removable elements
are shown detached for clarity of illustration only.