Dates/Times in selected Timezones

Thanks for the response. I have looked at these and can have the dataset calculate to one timezone. This is what I actually did for the UK times. What I am trying to work out if there is a way for the user themselves to select one of four time zones and the data set recalculate. From my testing you can only update columns on refresh not when filtered. Currently looking at re-engingeering all my measure so they take into account of the filter and recalculate the figures. A little complicated but hopefully will work.