Add some Text Inside of the Tooltip

[jt4000]

Goal:
When I have the cursor to display the tooltip I would like add the name of the month and then you display numbers

Problem:
I don't know how to do it in Chartjs version 1

Info:
*The X angle is Date
*Please remember that the name of the month would be changing based on user's selection from dropdownlist. The month is dynamical. In order to make the data to be dynamical I have the data inside of a input box and the n It will be sent tto Chart JS.
*If possible to show the solution inside of JSBin or JSfiddle.
*http://jsbin.com/mofeqavicu/edit?html,output

[etimberg]

Once #1542 is merged into v2 this will be supported natively.

[etimberg]

Closing as #1542 was merged. See the tooltip hooks sample for details. V2 docs can be found at http://nnnick.github.io/Chart.js/docs-v2/