The ornamental design for a circular calendarsheet, as shown and described.
FIG. 1 is a top view of the circular calendar sheet;
FIG. 2 is an enlarged detail view of the top left quadrant of the circular calendar sheet of FIG. 1;
FIG. 3 is an enlarged detail view of the top right quadrant of the circular calendar sheet of FIG. 1;
FIG. 4 is an enlarged detail view of the bottom left quadrant of the circular calendar sheet of FIG. 1; and,
FIG. 5 is an enlarged detail view of the bottom right quadrant of the circular calendar sheet of FIG. 1.
The back view of the circular calendar sheet is flat and plain. The sheet is of conventional thickness.
The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.