Changing pre_zone in Kibana

May be it is already discussed topic, I was looking for a way to change the pre_zone parameter value in Kibana Date Histogram's request body. It automatically add pre_zone as -7:00 which apparently change the time data value in the Histogram. How can I do that.

I am using ES 1.7 and Kibana 4.1, I am unable to find tz field in advance settings.