I am Displaying Date using ccDate not working Display Error i don't know whats the error?

Summary:

I have just want to display current date using ccDate but it display error that Display Error: Unable to process binding "ccDate: function(){return {date:currentDate} }" Message: currentDate is not defined

Content (required):

Version (include the version you are using, if applicable):

22c

Code Snippet (add any code snippets that support your topic, if applicable):

<div data-bind="ccDate:{date: currentDate}"></div>