Tasks and different timezones

It would be great if we could change the timezone we are working on Tasks.
I live in Germany and my team in South America and all the time I save a task for a specific day (I don`t need to schedule a time for the task) it shows for my team the tast to be solve in 2 days.
It would be great if I could change on Smarttask my timezone and not on my computer.