I\'m developing a project that is expected to show this graph: http://jsfiddle.net/Kc23N/
When I click a point (tooltip) I want to show a date understandable, not th
You should use xDateFormat in tooltip for customizing your format date http://api.highcharts.com/highcharts#tooltip.xDateFormat
sample: tooltip: { xDateFormat: '%Y-%m-%d' },