We had a requirement that needs to be customize the OOTB calendar instance. And those rules are final rules. Suppose on 9th Feb-17 there are 3 cases has been reached the goal time then these 3 cases will be shown on 9th Feb-17 date with orange color (goal time) within a small circle. Please refer the screenshot attached.
If user mouse over the the circle then a smart info will shown with case ID and Name of the flow. Please do let us know whether its a good practice to modify final rules? Even we modify them into our rule set will the functionality will work as like OOTB?