Set TimeZone On Bookable Resource in Field service CRM

Hi All,

I am trying to set Time Zone field in bookable resource on load of form but while debugging getting timezone value is correct but for displaying its showing the default timezone value.when am saving the record its showing the correct timezone but applied this on load of form.

function setTimeZone (executionContext)
{
var formContext = executionContext.getFormContext();
formContext.getAttribute("timezone").setValue(110);
Xrm.Page.data.entity.save();
}

What could be the issue ?Is it a default timezone behaviour issue ?

Thanks,

Jharana