HighStock xDateFormat month name

Question

I'm using HighStock to display a stockChart. The XAxis of the HighStock chart is datetime.

How can I display the full month name in the tooltip's header?

Answer 1

I spent almost a full hour digging for the %B key. Hopefully it'll help someone else trying to achieve something similar.

tooltip: {
    headerFormat: '<b>{point.key}</b>',
    xDateFormat: '%B %Y',
    ....