At this moment it's hardcoded. You would need to change it in the source code.
It's line 669 in Month.src.js in the latest build - e.onmousemove() function.
Replace this line
e.style.cursor = 'default';
with this:
e.style.cursor = 'pointer';
You may want to check the compilation instructions:
Thanks
Any thought to moving to an option for the control itself. i would like to use pointer too but don't really want to recompile your code after every release you push out.