An ornamentaldesign for the calendar, as substantially shown and described.
FIG. 1 is a front elevational view of the calendar, a rear elevational view would disclose a blank configuration of the same size. A view along any side of the item would show a thin straight line;
FIG. 2 is a front elevational view of an attachment that would stick on the calendar of FIG. 1, a rear elevational view would be a mirror image of this and side views would simply indicate a line of conventional thickness; and,
FIG. 3 is a front elevational view of an attachment that would stick on the calendar of FIG. 1, a rear elevational view would be a mirror image of this and side views would disclose a thin line.