The ornamental design for a globeclock, as shown and described.
FIG. 1 is a perspective view of a globe clock showing my new design;
FIG. 2 is a front elevational view, with the rear, left, and right elevation views being identical, thereof;
FIG. 3 is a top view thereof; and,
FIG. 4 is an environmental perspective view thereof.
The broken line showing of the clock hands, numbers and letters on the globe base, and landforms on the globe in FIGS. 1 and 4 is for illustrative purposes only and forms no part of the claimed design. The broken line showing of the city square and trees in FIG. 4 is for illustrative purposes only and forms no part of the claimed design.