Creating a calendar button in the module bar

Creating a calendar button in the module bar

When in Zoho CRM the module bar covers the area of the CRM modules.  I know I can create a link on the right in a module where I can go to my calendar.  I would like to create a button in the module bar for access to my calendar so that no matter what module I am in I can go right to it and prefer not to start another browser tab. I haven't seen where you can create it.  Is it possible?